[jdk17u] RFR: 8276854: Windows GHA builds fail due to broken Cygwin

[Aleksey Shipilev]

Clean backport to fortify Windows GHA runs.

Additional testing:
 - [ ] GHA Windows builds are fine
 - [ ] GHA Windows tests are fine

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Commit messages:
 - Backport 403f3185f0988dcf6ef4e857d6659533bfa2943f

Changes: https://git.openjdk.java.net/jdk17u/pull/266/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u&pr=266&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8276854
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk17u/pull/266.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u pull/266/head:pull/266

PR: https://git.openjdk.java.net/jdk17u/pull/266