RFR: 8371920: [TEST] Enable CMove tests on other platforms

[Hamlin Li]

Hi,
Can you help to review this patch?

[JDK-8357551](https://bugs.openjdk.org/browse/JDK-8357551) add support of CMoveF/D vectorization, at the same time it also adds some tests for scalar CMove on riscv.
It's good to enable these tests on other platforms, like x86/aarch64 or maybe others.

At the same time, this pr also move these tests under `compiler/c2/cmove`, as suggested here https://github.com/openjdk/jdk/pull/28309#discussion_r2598664764.

Thanks!

## Test
In progress... (I'm using github CI to run the tests.)

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Commit messages:
 - move dir
 - enable tests for aarch64
 - enable tests for x64
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - ... and 13 more: https://git.openjdk.org/jdk/compare/6700baa5...c901dece

Changes: https://git.openjdk.org/jdk/pull/28702/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28702&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8371920
  Stats: 89 lines in 3 files changed: 0 ins; 2 del; 87 mod
  Patch: https://git.openjdk.org/jdk/pull/28702.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28702/head:pull/28702

PR: https://git.openjdk.org/jdk/pull/28702