RFR: 8361478: GHA: Use MSYS2 from GHA runners [v2]

[Aleksey Shipilev]

> Installing MSYS2 takes considerable time in our Windows workflows. Fortunately, GHA runners currently ship with MSYS2 bundled! The docs for setup-msys2 step say it is enough to say `release: false` to use those:
>  https://github.com/msys2/setup-msys2?tab=readme-ov-file#release
> 
> Also bumping the action version to gain access to the actual installed path.
> 
> Additional testing:
>  - [x] GHA

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 two additional commits since the last revision:

 - Merge branch 'master' into JDK-8361478-gha-msys2
 - Fix

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/26156/files
  - new: https://git.openjdk.org/jdk/pull/26156/files/32328a28..f05fd79f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26156&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26156&range=00-01

  Stats: 33118 lines in 1000 files changed: 20691 ins; 6424 del; 6003 mod
  Patch: https://git.openjdk.org/jdk/pull/26156.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26156/head:pull/26156

PR: https://git.openjdk.org/jdk/pull/26156