Add Ubuntu 24.10 to popular containers

[pb8o]

Changes

• Add Ubuntu 24.10 to the popular containers test, and remove 23.10
• Drop some dead code supporting old releases.

Reason

...

License Acceptance

By submitting this pull request, I confirm that my contribution is made under
the terms of the Apache 2.0 license. For more information on following Developer
Certificate of Origin and signing off your commits, please check
CONTRIBUTING.md.

PR Checklist

• If a specific issue led to this PR, this PR closes the issue.
• The description of changes is clear and encompassing.
• Any required documentation changes (code and docs) are included in this
  PR.
• API changes follow the Runbook for Firecracker API changes.
• User-facing changes are mentioned in CHANGELOG.md.
• All added/changed functionality is tested.
• New TODOs link to an issue.
• Commits meet
  contribution quality standards.

---

• This functionality cannot be added in rust-vmm.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.10%. Comparing base (e04cdfe) to head (a7ae361).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4882   +/-   ##
=======================================
  Coverage   84.10%   84.10%           
=======================================
  Files         251      251           
  Lines       28083    28083           
=======================================
  Hits        23619    23619           
  Misses       4464     4464           

Flag	Coverage Δ
5.10-c5n.metal	84.68% <ø> (ø)
5.10-m5n.metal	84.66% <ø> (ø)
5.10-m6a.metal	83.96% <ø> (ø)
5.10-m6g.metal	80.78% <ø> (ø)
5.10-m6i.metal	84.65% <ø> (+<0.01%)	⬆️
5.10-m7g.metal	80.78% <ø> (ø)
6.1-c5n.metal	84.67% <ø> (-0.01%)	⬇️
6.1-m5n.metal	84.66% <ø> (ø)
6.1-m6a.metal	83.97% <ø> (+<0.01%)	⬆️
6.1-m6g.metal	80.78% <ø> (ø)
6.1-m6i.metal	84.65% <ø> (+<0.01%)	⬆️
6.1-m7g.metal	80.78% <ø> (ø)

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