8361478: GHA: Use MSYS2 from GHA runners

[shipilev]

Improves GHA performance a bit.

Additional testing:

• GHA

---

Progress

• JDK-8361478 needs maintainer approval
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8361478: GHA: Use MSYS2 from GHA runners (Enhancement - P4 - Requested)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u-dev.git pull/2104/head:pull/2104
$ git checkout pull/2104

Update a local copy of the PR:
$ git checkout pull/2104
$ git pull https://git.openjdk.org/jdk21u-dev.git pull/2104/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 2104

View PR using the GUI difftool:
$ git pr show -t 2104

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk21u-dev/pull/2104.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back shade! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

⚠️ @shipilev This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[mlbridge]

Webrevs

• 00: Full (2fdf1e72)

[shipilev]

/approval request Improves GHA performance. The patch was in mainline for a few weeks, and we have seen no problems with it. Applies cleanly. Risk is low: GHA only patch.

[openjdk]

@shipilev
8361478: The approval request has been created successfully.

[shipilev]

GHA failure is environmental. I'll restart the jobs just in case.