[jdk11u-dev] RFR: 8268185: Update GitHub Actions for jtreg 6 [v4]

[Goetz Lindenmaier]

On Thu, 28 Jul 2022 08:53:35 GMT, George Adams <duke at openjdk.org> wrote:

>> simple backport of [JDK-8268185](https://bugs.openjdk.java.net/browse/JDK-8268185): Update GitHub Actions for jtreg 6 in preparation for the GitHub action rewrite backport. Backport applies cleanly even though it can't detect it for some reason and I cannot add the clean label.
>
> George Adams 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 one additional commit since the last revision:
> 
>   Backport e27c4d463d920994b79b8163f063ad74f6ee5d59

LGTM

After pushing the other change, you have to give the bots some minutes to resolve this one.
Sometimes they manage and you can integrate right away, sometimes you need to merge.

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Marked as reviewed by goetz (Reviewer).

PR: https://git.openjdk.org/jdk11u-dev/pull/1239