RFR: 8324937: GHA: Avoid multiple test suites per job

[Christoph Langer]

On Tue, 30 Jan 2024 10:34:40 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> See the description in the bug. This mitigates the issue by splitting out the only test job that has two test suites in it.

Marked as reviewed by clanger (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/17627#pullrequestreview-1855755356