[jdk21u-dev] RFR: 8358538: Update GHA Windows runner to 2025

[Aleksey Shipilev]

Fixes GHA. Current Windows runners are already in brown-out stage, and will be decommissioned by the end of the month. So we need to get it into update repos soon.

Additional testing:
 - [ ] GHA

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

Commit messages:
 - Backport b787ff6def08a050b690b60e4a0ceb3aec2b73c8

Changes: https://git.openjdk.org/jdk21u-dev/pull/1853/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1853&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8358538
  Stats: 6 lines in 2 files changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1853.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1853/head:pull/1853

PR: https://git.openjdk.org/jdk21u-dev/pull/1853