[7.17] (backport #19558) deps: Bump ironbank version to 9.7

[mergify]

deps: Bump ironbank version

deps(ironbank): Bump ubi version to 9.7

changed lines [7] of file "/tmp/updatecli/github/elastic/apm-server/packaging/ironbank/Dockerfile"

deps(ironbank): Bump ubi version to 9.7

change detected: * key "$.args.BASE_TAG" updated from "\"9.6\"" to "\"9.7\"", in file "packaging/ironbank/hardening_manifest.yaml"

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This is an automatic backport of pull request #19558 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 154b806 has failed:

On branch mergify/bp/7.17/pr-19558
Your branch is up to date with 'origin/7.17'.

You are currently cherry-picking commit 154b8060.
  (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:   packaging/ironbank/Dockerfile

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   packaging/ironbank/hardening_manifest.yaml

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

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[elasticmachine]

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