[9.1] (backport #18426) bump: ubi 9.7

[mergify]

Release notes

Update to newest ubi version 9.7

What does this PR do?

Update the version in the relevant files

Why is it important/What is the impact to the user?

9.6 reached EoL

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files (and/or docker env variables)
• I have added tests that prove my fix is effective or that my feature works

Author's Checklist

• [ ]

How to test this PR locally

Related issues

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---

This is an automatic backport of pull request #18426 done by [Mergify](https://mergify.com).

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[elasticmachine]

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• Commit: 59d6ea3

cc @v1v