RFR: 8293098: GHA: Harmonize GCC version handling for host and cross builds [v2]

[Magnus Ihse Bursie]

On Tue, 30 Aug 2022 15:40:07 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> I would prefer to do it later, as there are dependent PRs riding on this one, and testing takes quite a while...

That's up to you. I'm okay with this change as-is.

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PR: https://git.openjdk.org/jdk/pull/10083