[7.17](backport #39988) Update Ironbank Dockerfile to ubi 9.4

[mergify]

Change ubi base image from 9.3 to 9.4 used in Ironbank Docker images for all 8.X Beats

---

This is an automatic backport of pull request #39988 done by Mergify.

[mergify]

Cherry-pick of cd8ed8a has failed:

On branch mergify/bp/7.17/pr-39988
Your branch is up to date with 'origin/7.17'.

You are currently cherry-picking commit cd8ed8a6d5.
  (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)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   dev-tools/packaging/templates/ironbank/auditbeat/Dockerfile
	both modified:   dev-tools/packaging/templates/ironbank/metricbeat/Dockerfile
	both modified:   dev-tools/packaging/templates/ironbank/packetbeat/Dockerfile

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[botelastic]

This pull request doesn't have a Team:<team> label.

[mergify]

This pull request has not been merged yet. Could you please review and merge it @jlind23? 🙏