[jdk25u-dev] RFR: 8372733: GHA: Bump to Ubuntu 24.04

[Aleksey Shipilev]

Time to start switching update releases to newer runners.

Additional testing:
 - [ ] GHA

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Commit messages:
 - Backport 177f3404dfb146be724d952f8c88b4d070e36b52

Changes: https://git.openjdk.org/jdk25u-dev/pull/208/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u-dev&pr=208&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8372733
  Stats: 21 lines in 4 files changed: 12 ins; 0 del; 9 mod
  Patch: https://git.openjdk.org/jdk25u-dev/pull/208.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u-dev.git pull/208/head:pull/208

PR: https://git.openjdk.org/jdk25u-dev/pull/208