RFR: 8328705: GHA: Cross-compilation jobs do not require build JDK

[Aleksey Shipilev]

On Thu, 21 Mar 2024 16:57:40 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Noticed this while fixing other GHA issues.
> 
> We pass build JDK to cross-compilation jobs, which makes them dependent on Linux-x64 builds. But we only build hotspot in all those jobs, so AFAICS there is no need for build JDK, and therefore no need for the dependency. Untying cross-compilation jobs from Linux-x64 builds make GHA more parallel. 
> 
> Additional testing:
>  - [ ] GHA

GHAs pass for this, but RISC-V would be only fixed after #18435 lands.

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PR Comment: https://git.openjdk.org/jdk/pull/18437#issuecomment-2013014641