[crac] RFR: Stabilize GHA testsuite

[Roman Marchenko]

On Fri, 6 Oct 2023 13:17:45 GMT, Radim Vansa <rvansa at openjdk.org> wrote:

> At this point Github Actions always show some failures; let's ignore platforms that we don't handle for CRaC and some problematic tests in mainline JDK.

Why should we exclude builds, and why don't merge from upstream to fix them?

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PR Comment: https://git.openjdk.org/crac/pull/125#issuecomment-1813887893