Add Ubuntu 24.04 noble and remove legacy Ubuntu

[methane]

Proposed changes

Add info about Ubuntu 24.04 to installation.rst.
Remove some legacy Ubuntu versions too.

Checklist

Before creating a PR, run through this checklist and mark each as complete:

• I have read the contributing guidelines.
• I have signed the F5 Contributor License Agreement (CLA).
• If applicable, I have added tests that prove my fix is effective or that my feature works.
• If applicable, I have checked that any relevant tests pass after adding my changes.
• I have updated any relevant documentation (README.md and/or CHANGELOG.md).

[ac000]

Thanks for the PR, although it is actually covered by this one.