8370489: Some compiler tests miss the @key randomness

[rm-gh-8]

Backporting JDK-8370489: Some compiler tests miss the @key randomness.

This PR adds the missing @key randomness jtreg tag to compiler tests that use randomization via getRandomInstance() to properly categorize them for test execution filtering.

This PR is not clean because the following tests are currently not present in JDK 25

test/hotspot/jtreg/compiler/c2/aarch64/TestFloat16Replicate.java
test/hotspot/jtreg/compiler/loopopts/superword/TestAliasing.java
test/hotspot/jtreg/compiler/vectorapi/VectorMaskCastIdentityTest.java

These tests were not included because it would involve backporting a fairly large commit dependency graph which includes behavioral changes (JDK-8361582, JDK-8324751 and JDK-8356760)

For parity with Oracle JDK.

It is part of a series of dependent PRs for JDK 25, related to the following list of ordered issues:

8358772: Template-Framework Library: Primitive Types
8358600: Template-Framework Library: Template for TestFramework test class
8359412: Template-Framework Library: Operations and Expressions
8367531: Template Framework: use scopes and tokens instead of misbehaving immediate-return-queries
8370489: Some compiler tests miss the @key randomness

Ran related tests on linux-x64, linux-aarch64, macos-aarch64 and windows-x64:

make test TEST="test/hotspot/jtreg/compiler/arraycopy/stress test/hotspot/jtreg/compiler/intrinsics"

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8370489 needs maintainer approval

Integration blocker

 ⚠️ Dependency #388 must be integrated first

Issue

• JDK-8370489: Some compiler tests miss the @key randomness (Bug - P5 - Requested)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk25u-dev.git pull/389/head:pull/389
$ git checkout pull/389

Update a local copy of the PR:
$ git checkout pull/389
$ git pull https://git.openjdk.org/jdk25u-dev.git pull/389/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 389

View PR using the GUI difftool:
$ git pr show -t 389

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk25u-dev/pull/389.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back rm-gh-8! A progress list of the required criteria for merging this PR into pr/388 will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[mlbridge]

Webrevs

• 00: Full (cb65699f)

[rm-gh-8]

Review will be requested after merging from head once the prerequisite is pushed. The merge from head will require a re-review.