[wip] refactor: default function implementations in EpochManagerAdapter trait

[stedfn]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 70.86614% with 37 lines in your changes missing coverage. Please review.

Project coverage is 70.39%. Comparing base (8b861f8) to head (e12f05b).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
chain/epoch-manager/src/adapter.rs	70.86%	5 Missing and 32 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #12850      +/-   ##
==========================================
- Coverage   70.40%   70.39%   -0.02%     
==========================================
  Files         851      851              
  Lines      174188   174194       +6     
  Branches   174188   174194       +6     
==========================================
- Hits       122634   122619      -15     
- Misses      46311    46327      +16     
- Partials     5243     5248       +5     

Flag	Coverage Δ
backward-compatibility	0.16% <0.00%> (-0.01%)	⬇️
db-migration	0.16% <0.00%> (-0.01%)	⬇️
genesis-check	1.41% <0.00%> (-0.01%)	⬇️
linux	70.07% <70.86%> (+0.01%)	⬆️
linux-nightly	70.01% <70.86%> (-0.03%)	⬇️
pytests	1.71% <0.00%> (-0.01%)	⬇️
sanity-checks	1.52% <0.00%> (-0.01%)	⬇️
unittests	70.22% <70.86%> (-0.02%)	⬇️
upgradability	0.20% <0.00%> (-0.01%)	⬇️

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