fix next epoch

[tzemanovic]

Describe your changes

• fix integration::ledger_tests::pgf_governance_proposal determinism issue
• add inflation integration test

Checklist before merging

• If this PR has some consensus breaking changes, I added the corresponding breaking:: labels
  • This will require 2 reviewers to approve the changes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.41%. Comparing base (ac24f58) to head (e713446).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3756   +/-   ##
=======================================
  Coverage   72.41%   72.41%           
=======================================
  Files         335      335           
  Lines      104005   104005           
=======================================
  Hits        75320    75320           
  Misses      28685    28685           

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[Fraccaman]

thanks a lot @tzemanovic !