feat: use longest common prefix for determining tx replay set

[hstove]

• Closes Tx Replay: when agreeing on transaction replay set, use the biggest subset of transactions #6209

This PR adds the ability for the global state machine evaluator to use a longest common prefix algorithm to determine the global transaction replay set after a fork.

For example, if one replay set is [A,B,C] with 50% weight, and another is [A,B] with 30% weight, then we will use [A,B] as the global replay set.

There is code for ensuring we end up with a deterministic global replay set by doing a comparison of signer weight, and then length, and then via txid comparisons.

[jferrant]

LGTM: only some minor nits.

[codecov]

Codecov Report

❌ Patch coverage is 88.39286% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 75.94%. Comparing base (0752841) to head (3361418).
⚠️ Report is 44 commits behind head on develop.

Files with missing lines	Patch %	Lines
libsigner/src/tests/signer_state.rs	88.02%	20 Missing ⚠️
libsigner/src/v0/signer_state.rs	89.47%	6 Missing ⚠️

❌ Your project status has failed because the head coverage (75.94%) is below the target coverage (80.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #6353      +/-   ##
===========================================
+ Coverage    75.33%   75.94%   +0.60%     
===========================================
  Files          555      555              
  Lines       350915   351135     +220     
===========================================
+ Hits        264358   266665    +2307     
+ Misses       86557    84470    -2087     

Files with missing lines	Coverage Δ
libsigner/src/v0/signer_state.rs	85.52% <89.47%> (+1.59%)	⬆️
libsigner/src/tests/signer_state.rs	73.30% <88.02%> (-10.70%)	⬇️

... and 308 files with indirect coverage changes

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[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.