feat: store migration setup (backport #794)

[mergify]

This is an automatic backport of pull request #794 done by Mergify.
Cherry-pick of 841c93c has failed:

On branch mergify/bp/release/v0.8.x/pr-794
Your branch is up to date with 'origin/release/v0.8.x'.

You are currently cherry-picking commit 841c93c.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   cmd/ethermintd/root.go
	new file:   x/evm/keeper/migrations.go
	modified:   x/evm/module.go
	new file:   x/feemarket/keeper/migrations.go
	modified:   x/feemarket/module.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   CHANGELOG.md

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[codecov]

Codecov Report

Merging #795 (c851500) into release/v0.8.x (70480d2) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@                Coverage Diff                 @@
##           release/v0.8.x     #795      +/-   ##
==================================================
+ Coverage           57.45%   57.51%   +0.05%     
==================================================
  Files                  71       73       +2     
  Lines                6107     6115       +8     
==================================================
+ Hits                 3509     3517       +8     
  Misses               2396     2396              
  Partials              202      202              

Impacted Files	Coverage Δ
x/evm/keeper/migrations.go	100.00% <100.00%> (ø)
x/evm/module.go	54.68% <100.00%> (ø)
x/feemarket/keeper/migrations.go	100.00% <100.00%> (ø)