chore(inflation): run migration to delete EpochMintProvision from the store

[Vvaradinov]

Description

Closes: ENG-1270

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• added a relevant changelog entry to the Unreleased section in CHANGELOG.md
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Code maintenance:

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• written unit and integration tests
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Reviewers Checklist

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I have...

• confirmed the correct type prefix in the PR title
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[linear]

ENG-1270 Remove EpochMintProvision from store

[codecov]

Codecov Report

Merging #1210 (a183e20) into main (e4da9cb) will increase coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head a183e20 differs from pull request most recent head 0938737. Consider uploading reports for the commit 0938737 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1210      +/-   ##
==========================================
+ Coverage   76.41%   76.42%   +0.01%     
==========================================
  Files         148      149       +1     
  Lines        8073     8078       +5     
==========================================
+ Hits         6169     6174       +5     
  Misses       1708     1708              
  Partials      196      196              

Impacted Files	Coverage Δ
x/inflation/keeper/migrations.go	100.00% <100.00%> (ø)
x/inflation/migrations/v3/migrate.go	100.00% <100.00%> (ø)

[4rgon4ut]

LGTM! Good job @Vvaradinov