AV-1463: add custom log format for chain prefix and source location

[ceyonur]

Adds chain prefixes and source location to logs, through custom log formatting.
An example output (from CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB.log)

{"@level":"debug","@message":"plugin address","@timestamp":"2022-04-07T22:09:16.334408+03:00","address":"/var/folders/qx/3vldh17n7_n2l8fd5ysyr7bw0000gn/T/plugin2351922550","network":"unix"}
{"@level":"trace","@message":"plugin received interrupt signal, ignoring","@timestamp":"2022-04-07T22:10:12.522463+03:00","count":1}
{"@level":"debug","@message":"plugin address","@timestamp":"2022-04-07T22:10:52.801265+03:00","address":"/var/folders/qx/3vldh17n7_n2l8fd5ysyr7bw0000gn/T/plugin1845823026","network":"unix"}
INFO [04-07|22:10:52.802] Initializing Subnet EVM VM               Version=v0.2.1@197b3f1bd45f11bda1fc8f45d75ce2706ab3e9ec Config="{\"snowman-api-enabled\":false,\"admin-api-enabled\":false,\"admin-api-dir\":\"\",\"eth-apis\":[\"public-eth\",\"public-eth-filter\",\"net\",\"web3\",\"internal-public-eth\",\"internal-public-blockchain\",\"internal-public-transaction-pool\"],\"continuous-profiler-dir\":\"\",\"continuous-profiler-frequency\":{\"Duration\":900000000000},\"continuous-profiler-max-files\":5,\"rpc-gas-cap\":50000000,\"rpc-tx-fee-cap\":100,\"preimages-enabled\":false,\"pruning-enabled\":true,\"snapshot-async\":true,\"snapshot-verification-enabled\":false,\"metrics-enabled\":true,\"metrics-expensive-enabled\":false,\"local-txs-enabled\":false,\"api-max-duration\":{\"Duration\":0},\"ws-cpu-refill-rate\":{\"Duration\":0},\"ws-cpu-max-stored\":{\"Duration\":0},\"api-max-blocks-per-request\":0,\"allow-unfinalized-queries\":false,\"allow-unprotected-txs\":false,\"keystore-directory\":\"\",\"keystore-external-signer\":\"\",\"keystore-insecure-unlock-allowed\":false,\"remote-tx-gossip-only-enabled\":false,\"tx-regossip-frequency\":{\"Duration\":60000000000},\"tx-regossip-max-size\":15,\"log-level\":\"info\",\"feeRecipient\":\"\",\"offline-pruning-enabled\":false,\"offline-pruning-bloom-filter-size\":512,\"offline-pruning-data-directory\":\"\",\"max-outbound-active-requests\":8}"
INFO [04-07|22:10:52.804] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/trie/database.go:750: Persisted trie from memory database nodes=5 size=806.00B time="17.541µs" gcnodes=0 gcsize=0.00B gctime=0s livenodes=1 livesize=-164.00B
INFO [04-07|22:10:52.804] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/eth/backend.go:133: Allocated trie memory caches clean=75.00MiB dirty=256.00MiB
INFO [04-07|22:10:52.805] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/core/genesis.go:195: Writing genesis to database 
INFO [04-07|22:10:52.805] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/trie/database.go:750: Persisted trie from memory database nodes=5 size=806.00B time="162.125µs" gcnodes=0 gcsize=0.00B gctime=0s livenodes=1 livesize=-164.00B
INFO [04-07|22:10:52.806] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/eth/backend.go:139: Initialised chain configuration config="{ChainID: 43214 Homestead: 0 EIP150: 0 EIP155: 0 EIP158: 0 Byzantium: 0 Constantinople: 0 Petersburg: 0 Istanbul: 0, Muir Glacier: 0, Subnet EVM: 0, FeeConfig: {\"gasLimit\":8000000,\"targetBlockRate\":2,\"minBaseFee\":25000000000,\"targetGas\":15000000,\"baseFeeChangeDenominator\":36,\"minBlockGasCost\":0,\"maxBlockGasCost\":1000000,\"blockGasCostStep\":200000}, AllowFeeRecipients: false, ContractDeployerAllowListConfig: {{0 [0x8db97C7cEcE249c2b98bDC0226Cc4C2A57BF52FC]}}, ContractNativeMinterConfig: {{0 [0x8db97C7cEcE249c2b98bDC0226Cc4C2A57BF52FC]}}, Engine: Dummy Consensus Engine}"
INFO [04-07|22:10:52.806] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/eth/backend.go:173: Initialising Ethereum protocol network=43214 dbversion=<nil>
WARN [04-07|22:10:52.806] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/eth/backend.go:179: Upgrade blockchain database version from=<nil> to=8
INFO [04-07|22:10:52.807] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/core/blockchain.go:298: Loaded most recent local header number=0 hash=c0da56..9728d6 age=53y1w2d
INFO [04-07|22:10:52.807] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/core/blockchain.go:299: Loaded most recent local full block number=0 hash=c0da56..9728d6 age=53y1w2d
INFO [04-07|22:10:52.807] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/core/blockchain.go:253: Initializing snapshots async=false
WARN [04-07|22:10:52.807] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/core/state/snapshot/snapshot.go:219: Failed to load snapshot, regenerating err="missing or corrupted snapshot, no snapshot block hash"
INFO [04-07|22:10:52.807] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/core/state/snapshot/snapshot.go:775: Rebuilding state snapshot 
INFO [04-07|22:10:52.807] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/core/state/snapshot/snapshot.go:354: Waiting for snapshot generation root=231a13..626611
INFO [04-07|22:10:52.807] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/core/state/snapshot/generate.go:101: Wiper running, state snapshotting paused accounts=0 slots=0 storage=0.00B elapsed="162.458µs"
INFO [04-07|22:10:52.808] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/core/state/snapshot/wipe.go:133: Deleted state snapshot leftovers kind=accounts wiped=0 elapsed="340.042µs"
INFO [04-07|22:10:52.808] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/core/state/snapshot/wipe.go:133: Deleted state snapshot leftovers kind=storage  wiped=0 elapsed="162.916µs"
INFO [04-07|22:10:52.808] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/core/state/snapshot/generate.go:101: Resuming state snapshot generation root=231a13..626611 accounts=0 slots=0 storage=0.00B elapsed="2.791µs"
INFO [04-07|22:10:52.809] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/core/state/snapshot/generate.go:360: Generated state snapshot accounts=3 slots=2 storage=387.00B elapsed="635.833µs"
WARN [04-07|22:10:52.809] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/core/rawdb/accessors_metadata.go:111: Error reading unclean shutdown markers error="not found"
INFO [04-07|22:10:52.810] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/core/tx_pool.go:502: Transaction pool price threshold updated price=0
INFO [04-07|22:10:52.810] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/plugin/evm/vm.go:370: lastAccepted = 0xc0da563d1b0b76efdf3a7a1b51a943b53d6f081f1e35eaa9d7db88d61c9728d6 
INFO [04-07|22:10:52.810] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> snow/engine/snowman/transitive.go#67: initializing consensus engine
INFO [04-07|22:10:52.811] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> vms/proposervm/vm.go#214: block height indexing is already complete
INFO [04-07|22:10:52.811] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> snow/engine/snowman/bootstrap/bootstrapper.go#213: Starting bootstrap...
INFO [04-07|22:10:52.812] <CTfG5uAYxZhABKoqVHPgTRQF1RbHSbkc1LygbDYyycUD765qB Chain> github.com/ava-labs/subnet-evm/plugin/evm/vm.go:598: Enabled APIs: public-eth, public-eth-filter, net, web3, internal-public-eth, internal-public-blockchain, internal-public-transaction-pool 
{"@level":"trace","@message":"plugin received interrupt signal, ignoring","@timestamp":"2022-04-07T22:44:16.761969+03:00","count":1}

[aaronbuchwald]

LGTM