fix(@libp2p/protocol-perf): ensure only client calls measure performance

[maschad]

According to the spec perf is a client-driven set of benchmarks., therefore the server need not call the measurePerfomance method. This PR fixes two things:

• Only client calls the measurePerformance method
• The server node must remaining i.e. not stopped as there are multiple perf runs against a single server process. The test runner will end the server process.

[achingbrain]

Please can you check the state of the build before merging PRs.

The previous commit merged would have performed a release. One of the interop tests timed out which means the release didn't happen.

Now this commit is the head of master so release-please will not (may not?) perform the release since it's no longer the tip of the tree.

In general please do not merge to master when master is red.

[maschad]

My apologies, noted. Perhaps another way to articulate it is we should ensure our releases are successful before merging to master.