EVM-535: Use contractsapi bindings throught code

[goran-ethernal]

Description

This PR uses the contractsapi package and generated go stubs from contract functions and events, on places where it was missing.

PR expanded the ParseLog function on generated go stubs for contract events, so that the function returns two values:

• boolean - indicating if the given log matches the given event.
• error - if a log matches the event, but its parsing fails for some reason.

This simplifies the code on client that first matched the events with log, and then parsed it, shortening the code, and removing the manually added references to an event abi.

Changes include

• Bugfix (non-breaking change that solves an issue)
• Hotfix (change that solves an urgent issue, and requires immediate attention)
• New feature (non-breaking change that adds functionality)
• Breaking change (change that is not backwards-compatible and/or changes current functionality)

Checklist

• I have assigned this PR to myself
• I have added at least 1 reviewer
• I have added the relevant labels
• I have updated the official documentation
• I have added sufficient documentation in code

Testing

• I have tested this code with the official test suite
• I have tested this code manually

[Stefan-Ethernal]

Nice.

Leaving some thoughts to consider.