migrate stXXX/XXX constant product pool -> stableswap pool (backport #4384)

[mergify]

This is an automatic backport of pull request #4384 done by Mergify.
Cherry-pick of 0355d27 has failed:

On branch mergify/bp/v15.x/pr-4384
Your branch is up to date with 'origin/v15.x'.

You are currently cherry-picking commit 0355d275.
  (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:   CHANGELOG.md
	modified:   app/upgrades/v15/constants.go
	modified:   app/upgrades/v15/export_test.go
	modified:   app/upgrades/v15/upgrade_test.go
	modified:   app/upgrades/v15/upgrades.go
	modified:   tests/e2e/configurer/chain/commands.go
	modified:   tests/e2e/configurer/config/constants.go
	modified:   tests/e2e/configurer/upgrade.go
	modified:   tests/e2e/e2e_test.go
	modified:   x/gamm/keeper/pool.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   tests/e2e/configurer/chain/queries.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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