fix: pre-commit in workflows need to compare against origin/HEAD

[NickLarsenNZ]

Currently the pre-commit checks are not picking up problems, because it is skipping all checks in CI

As @Techassi found in the docs: https://pre-commit.com/#usage-in-continuous-integration, it needs to be run with extra options:

# pre-commit run --from-ref origin/HEAD --to-ref HEAD
pre-commit run --from-ref ${{ github.event.pull_request.base.sha }} --to-ref ${{ github.event.pull_request.head.sha }}

---

For each fix, do the following:

• [ ] Run pre-commit with --from-ref origin/HEAD --to-ref HEAD
• [ ] Pin the hooks to commits (replace rev tags with commit hashes like we do in github actions)

### Repositories that need fixing
- [ ] https://github.com/stackabletech/docker-images/pull/790
- [ ] docker-images pre-commit hook pinning
- [ ] operator-templating
- [ ] stackable-cockpit

[NickLarsenNZ]

Similar changes would need to be made in other repositories such as:

• docker-images
• stackable-cockpit
• ...

[NickLarsenNZ]

Ok, this is a bit more complicated in Github Actions, because there is only one ref:

$ git show-ref
d0de6cda5ad2e24366f07ad20f1f786ae2688116 refs/remotes/pull/790/merge

So, we need to use some github event data: https://github.com/pre-commit/action/issues/7#issuecomment-1251300704

[NickLarsenNZ]

Related: https://github.com/actions/checkout/issues/910