Make cygwin usage in GHA more reliable With this change we now attempt to retrieve the cygwin installer from cache every time we need it. We would also only try to download it once per build job, in the beginning. During testing we rely on it being cached which will make potential errors more obvious (e.g. in the download step in the beginning of the build).
I also replaced actions/cache@v2 with v3. Didn't see issues. ------------- Commit messages: - Make cygwin usage in GHA more reliable Changes: https://git.openjdk.java.net/jdk/pull/8113/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8113&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8284389 Stats: 55 lines in 1 file changed: 33 ins; 6 del; 16 mod Patch: https://git.openjdk.java.net/jdk/pull/8113.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/8113/head:pull/8113 PR: https://git.openjdk.java.net/jdk/pull/8113
