[crac] RFR: Add CRaC-specific tests to GHA [v3]

[Radim Vansa]

> Existing GitHub Actions run test tier1 but since most changes in this project focus on the CRaC capabilities we should run them in an automated fashion, too.
> Right now the tests are mostly failing: this should be addressed in https://github.com/openjdk/crac/pull/47

Radim Vansa has updated the pull request incrementally with two additional commits since the last revision:

 - Debug GHA
 - Debug GHA

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

Changes:
  - all: https://git.openjdk.org/crac/pull/48/files
  - new: https://git.openjdk.org/crac/pull/48/files/8a9bb6e0..358a4816

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=crac&pr=48&range=02
 - incr: https://webrevs.openjdk.org/?repo=crac&pr=48&range=01-02

  Stats: 50 lines in 2 files changed: 15 ins; 0 del; 35 mod
  Patch: https://git.openjdk.org/crac/pull/48.diff
  Fetch: git fetch https://git.openjdk.org/crac pull/48/head:pull/48

PR: https://git.openjdk.org/crac/pull/48