[jdk17u-dev] RFR: 8369226: GHA: Switch to MacOS 15 [v3]

[Aleksey Shipilev]

> Making GHA more stable.

Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision:

 - Merge branch 'master' into JDK-8369226-gha-macos15
 - Merge branch 'master' into JDK-8369226-gha-macos15
 - Merge branch 'master' into JDK-8369226-gha-macos15
 - Backport 1ea8cfa6dc8e6f96fd87553331abaae17ec173ea

-------------

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/4115/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/4115/files/45b39927..35ed994d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=4115&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=4115&range=01-02

  Stats: 1070 lines in 10 files changed: 1047 ins; 0 del; 23 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/4115.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/4115/head:pull/4115

PR: https://git.openjdk.org/jdk17u-dev/pull/4115