RFR: 8328705: GHA: Cross-compilation jobs do not require build JDK [v2]

[Aleksey Shipilev]

> 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

Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'master' into JDK-8328705-gha-cross-noneed-build
 - Fix

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/18437/files
  - new: https://git.openjdk.org/jdk/pull/18437/files/91073362..ab09c4ba

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18437&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18437&range=00-01

  Stats: 52703 lines in 2267 files changed: 7683 ins; 3769 del; 41251 mod
  Patch: https://git.openjdk.org/jdk/pull/18437.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18437/head:pull/18437

PR: https://git.openjdk.org/jdk/pull/18437