feat(client/v2): support gov proposals (backport #18461)

[mergify]

This is an automatic backport of pull request #18461 done by Mergify.
Cherry-pick of 9c3386f has failed:

On branch mergify/bp/release/v0.50.x/pr-18461
Your branch is up to date with 'origin/release/v0.50.x'.

You are currently cherry-picking commit 9c3386ffd.
  (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:   client/prompt_validation.go
	modified:   client/v2/README.md
	modified:   client/v2/autocli/flag/builder.go
	modified:   client/v2/internal/flags/flags.go
	new file:   client/v2/internal/prompt/validation.go
	new file:   client/v2/internal/prompt/validation_test.go
	modified:   x/auth/autocli.go
	modified:   x/consensus/autocli.go
	modified:   x/crisis/autocli.go
	modified:   x/distribution/autocli.go
	modified:   x/gov/autocli.go
	modified:   x/gov/client/cli/prompt.go
	modified:   x/gov/client/cli/tx.go
	modified:   x/gov/client/cli/util.go
	modified:   x/mint/autocli.go
	modified:   x/slashing/autocli.go
	modified:   x/staking/autocli.go
	modified:   x/upgrade/autocli.go

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   client/v2/CHANGELOG.md
	both modified:   client/v2/autocli/msg.go
	both modified:   client/v2/go.mod
	both modified:   client/v2/go.sum
	both modified:   go.mod
	both modified:   go.sum
	both modified:   simapp/go.mod
	both modified:   tests/go.mod
	deleted by us:   tests/starship/tests/go.mod
	deleted by us:   x/accounts/go.mod
	deleted by us:   x/auth/go.mod
	deleted by us:   x/auth/go.sum
	deleted by us:   x/authz/go.mod
	both modified:   x/bank/autocli.go
	deleted by us:   x/bank/go.mod
	deleted by us:   x/bank/go.sum
	both modified:   x/circuit/go.mod
	both modified:   x/circuit/go.sum
	deleted by us:   x/distribution/go.mod
	deleted by us:   x/distribution/go.sum
	both modified:   x/evidence/go.mod
	both modified:   x/evidence/go.sum
	both modified:   x/feegrant/go.mod
	both modified:   x/feegrant/go.sum
	deleted by us:   x/gov/go.mod
	deleted by us:   x/group/go.mod
	deleted by us:   x/group/go.sum
	deleted by us:   x/mint/go.mod
	deleted by us:   x/mint/go.sum
	both modified:   x/nft/go.mod
	both modified:   x/nft/go.sum
	deleted by us:   x/params/go.mod
	deleted by us:   x/params/go.sum
	deleted by us:   x/protocolpool/go.mod
	deleted by us:   x/protocolpool/go.sum
	deleted by us:   x/slashing/go.mod
	deleted by us:   x/slashing/go.sum
	deleted by us:   x/staking/go.mod
	deleted by us:   x/staking/go.sum
	both modified:   x/upgrade/client/cli/tx.go
	both modified:   x/upgrade/go.mod
	both modified:   x/upgrade/go.sum

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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[julienrbrt]

ref: #18461 (comment)

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[tac0turtle]

can we close this pr for now?

[julienrbrt]

can we close this pr for now?

We can, but I can't promise I'll remember to backport this once we fixed api versioning.

[julienrbrt]

Tracked here now: #18847