[jdk17u-dev] RFR: 8310259: Pin msys2/setup-msys2 github action to a specific commit [v2]

[Goetz Lindenmaier]

> I backport this to work around an error of msys2
> 
> I ran into this testing the bump to jtreg 7.2.
> This subsumes previous changes 8309934 and 8310183.

Goetz Lindenmaier has updated the pull request incrementally with two additional commits since the last revision:

 - Undo unrelated change
 - Does not build with 17
   
   We probably need jtreg 7 to build with 17.

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

Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/1573/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/1573/files/71d644f3..cea3d023

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1573&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1573&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1573.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1573/head:pull/1573

PR: https://git.openjdk.org/jdk17u-dev/pull/1573