feat(x/gov): extend governance config (backport #18428)

[mergify]

This is an automatic backport of pull request #18428 done by Mergify.
Cherry-pick of 89296cc has failed:

On branch mergify/bp/release/v0.50.x/pr-18428
Your branch is up to date with 'origin/release/v0.50.x'.

You are currently cherry-picking commit 89296ccdd.
  (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:   x/gov/README.md
	modified:   x/gov/keeper/msg_server_test.go
	modified:   x/gov/keeper/proposal.go
	modified:   x/gov/module.go
	modified:   x/gov/types/config.go
	modified:   x/gov/types/errors.go

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   CHANGELOG.md
	both modified:   api/cosmos/gov/module/v1/module.pulsar.go
	both modified:   proto/cosmos/gov/module/v1/module.proto
	deleted by us:   x/gov/go.mod
	deleted by us:   x/gov/go.sum
	both modified:   x/gov/keeper/keeper.go

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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[tac0turtle]

does this need to be backported?

[julienrbrt]

does this need to be backported?

This is a nice to have, does not per se need to be backported.

[julienrbrt]

Re-read our release policy and let's not backport it unless strongly requested. It causes us trouble with the because of the api module.