refactor(params): store all params under one key in evm module (backport #1617)

[mergify]

This is an automatic backport of pull request #1617 done by Mergify.
Cherry-pick of f07b14f has failed:

On branch mergify/bp/release/v0.21.x/pr-1617
Your branch is up to date with 'origin/release/v0.21.x'.

You are currently cherry-picking commit f07b14f1.
  (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:   app/ante/eth.go
	modified:   app/ante/fee_market.go
	modified:   app/ante/fees.go
	modified:   app/ante/interfaces.go
	modified:   app/ante/setup.go
	modified:   app/ante/sigverify.go
	modified:   app/app.go
	modified:   proto/ethermint/evm/v1/evm.proto
	modified:   x/evm/handler_test.go
	modified:   x/evm/keeper/keeper.go
	modified:   x/evm/keeper/migrations.go
	modified:   x/evm/keeper/params.go
	modified:   x/evm/keeper/params_test.go
	modified:   x/evm/keeper/utils_test.go
	modified:   x/evm/migrations/v4/migrate.go
	modified:   x/evm/migrations/v4/migrate_test.go
	deleted:    x/evm/migrations/v4/types/chain_config.go
	modified:   x/evm/migrations/v4/types/evm.pb.go
	deleted:    x/evm/migrations/v4/types/params.go
	new file:   x/evm/migrations/v5/migrate.go
	new file:   x/evm/migrations/v5/migrate_test.go
	new file:   x/evm/migrations/v5/types/evm.pb.go
	modified:   x/evm/module.go
	modified:   x/evm/types/evm.pb.go
	modified:   x/evm/types/key.go
	modified:   x/evm/types/params.go
	new file:   x/evm/types/params_legacy.go
	modified:   x/evm/types/params_test.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 #1626 (8270854) into release/v0.21.x (00b0d44) will decrease coverage by 0.18%.
The diff coverage is 73.00%.

❗ Current head 8270854 differs from pull request most recent head 693cdd5. Consider uploading reports for the commit 693cdd5 to get more accurate results

Additional details and impacted files

@@                 Coverage Diff                 @@
##           release/v0.21.x    #1626      +/-   ##
===================================================
- Coverage            68.31%   68.13%   -0.18%     
===================================================
  Files                  110      112       +2     
  Lines                10174    10131      -43     
===================================================
- Hits                  6950     6903      -47     
- Misses                2820     2824       +4     
  Partials               404      404              

Impacted Files	Coverage Δ
x/evm/keeper/migrations.go	77.77% <0.00%> (-22.23%)	⬇️
x/evm/types/key.go	0.00% <ø> (ø)
x/evm/types/params_legacy.go	0.00% <0.00%> (ø)
x/evm/module.go	52.17% <33.33%> (-1.56%)	⬇️
x/evm/keeper/params.go	43.47% <53.84%> (-40.99%)	⬇️
x/evm/migrations/v4/migrate.go	60.00% <66.66%> (-18.58%)	⬇️
app/ante/fees.go	82.83% <85.71%> (+0.39%)	⬆️
x/evm/migrations/v5/migrate.go	92.10% <92.10%> (ø)
app/ante/eth.go	80.17% <100.00%> (+0.08%)	⬆️
app/ante/fee_market.go	76.92% <100.00%> (+0.92%)	⬆️
... and 7 more