Rust agent config parsing

[mattiekat]

Description

This does two things:

1. It parses the agent-specific configs for the relayer, validator, and scraper.
2. It removes the rigid structures that had been in place for parsing that were called out earlier and instead parses the serde json values directly.

This PR does not cut over to the new versions just yet. That can happen once we start integrating it into the testing and deployment pipelines.

Drive-by changes

• Derive more was added and used where it made sense
• The old config macro was removed

Related issues

• Progress on Streamline config shapes (rust) #2215

Backward compatibility

Yes

Testing

None

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (9612623) 64.50% compared to head (5a74023) 64.50%.

Additional details and impacted files

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  Coverage   64.50%   64.50%           
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  Files          91       91           
  Lines        1386     1386           
  Branches      185      185           
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  Hits          894      894           
  Misses        485      485           
  Partials        7        7           

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[daniel-savu]

Great to see the raw config types removed, happy to merge if we go with the trait impl rather than the parse! macro