Add convenience init for Web3HttpProvider

[rinat-enikeev]

Summary of Changes

Adds the ability to initialise Web3HttpProvider sync and non optionally.

Test Data or Screenshots

Motivation: no need to make init sync and optional if client is sure the network provider is working.

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[yaroslavyaroslav]

We're still in our way to include swiftlint checks within ci/cd pipeline, so those checks are yet made manually by us.

[yaroslavyaroslav]

These style doesn't match with all the other code in our project, please format it in more swift way, like init attributes should be in one line and open curly brackets should follow them

[rinat-enikeev]

done e893cb3

[JeneaVranceanu]

@yaroslavyaroslav For large long functions and inits I'd break them into multiple lines.
E.g. for the init? of Web3HttpProvider:

public init?(_ httpProviderURL: URL,
             network net: Networks? = nil,
             keystoreManager: KeystoreManager? = nil) async {
                 ...
             }

instead of what we currently have.

@rinat-enikeev Nothing to change for you in this PR, just raising commenting on this topic.