[jdk11u-dev] RFR: 8287906: Rewrite of GitHub Actions (GHA) sanity tests [v3]

[George Adams]

> The final piece of the puzzle here, backports the GitHub actions rewrite. Also backported JDK-8288499 as it is required for this to be complete.
> 
> Clean other than the fact that JDK-8295714 was applied before so had to be rewritten and macOS-10.15 is now deprecated so had to switch to 11 (which had happened already in the old workflow layout.

George Adams has updated the pull request incrementally with one additional commit since the last revision:

  fixup build/test failures

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

Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/1554/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/1554/files/f224c9db..201d839f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1554&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1554&range=01-02

  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1554.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1554/head:pull/1554

PR: https://git.openjdk.org/jdk11u-dev/pull/1554