Check whether we still need manually applied patches for cert-manager

## What

Now we are using forked cert-manager with our patches.
We need to check whether we need patches.
If the contents of patches are fixed upstream, we stop applying patches, and if they are not fixed, we consider reporting upstream.

## How

- Survey release notes and codes.

## Checklist

- [ ] check its bug is fixed in upstream
- [ ] stop using patches or report to upstream
