Agent Config Base Parsing

[mattiekat]

Description

This is a big one for #2215...

1. Splits the parsing of configs from the config definitions to support both the old, new, and future parsers simultaneously. (We might want to rename it from parser to config format or something; not set on this name).
2. Implements the new config format without switching to it or enabling it. This means this PR does introduce dead code that is going to be used in the next PR.

Drive-by changes

• Deleted some unused (or single use) macros defined in hyperlane base
• Updated the definition of the config parsing trait to simplify implementation
• Added some more ergonomic methods of handling errors in config parsing
• Removed any raw unwrap() I noticed since these cause difficult to debug errors in prod.
• Added some additional validation to catch code mistakes in config path definitions

Related issues

• Progress on Streamline config shapes (rust) #2215
• Comes after Agent Config Typescript Definitions #2658

Backward compatibility

Yes

Testing

Manual (E2E only for now to make sure I did not break the old config format)

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (7c989e7) 64.61% compared to head (ccf13a0) 64.61%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2665   +/-   ##
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  Coverage   64.61%   64.61%           
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  Files          90       90           
  Lines        1379     1379           
  Branches      182      182           
=======================================
  Hits          891      891           
  Misses        481      481           
  Partials        7        7           

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[daniel-savu]

LGTM