add all hotspot variants so they are regenerated for trestle, remove third party variants

[sxa]

Add hotspot variants to the configuration so those jobs are regenerated and kept up to date with a view to using them in project trestle.

This is a follow on from the work to enable and test on a subset platforms at #1317 which has been shown to work as well as the Temurin pipelines.

This PR also removes most of the third party variants which we are no longer building (I've left them on x64 in case we want to test that our underlying code that supports those still works). We may wish to clarify whether Alibaba or Huawei are utilising our pipelines configurations in any way (I suspect not - OpenJ9 certainly are not as confirmed in the previous PR referenced above)

I was tempted to add in arm32/win32 as platforms for jdk25/26 to allow people using trestle to test on a 32-bit platform, and while that is feasible it would also require a suitable boot JDK to be made available which do not currently have on those platforms.

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[sxa]

run tests

[eclipse-temurin-bot]

 PR TESTER RESULT 

❎ Some pipelines failed or the job was aborted! ❎
See the pipeline-build-check below for more information...

[sxa]

Failure appears to have beenin https://ci.adoptium.net/job/build-scripts-pr-tester/job/build-test/job/jobs/job/jdk8u/job/jdk8u-windows-x64-temurin/23/console and is due to a permission denied error and locked files on

9:10:33  Cleaning workspace non-hidden files: C:/workspace/openjdk-build/*
[Pipeline] sh
19:10:35  + rm -rf C:/workspace/openjdk-build/CHANGELOG.md C:/workspace/openjdk-build/CONTRIBUTING.md [...]
19:10:35  rm: cannot remove 'C:/workspace/openjdk-build/CHANGELOG.md': Permission denied
19:10:35  rm: cannot remove 'C:/workspace/openjdk-build/CONTRIBUTING.md': Permission denied
19:10:35  rm: cannot remove 'C:/workspace/openjdk-build/FAQ.md': Permission denied
19:10:35  rm: cannot remove 'C:/workspace/openjdk-build/LICENSE': Permission denied
19:10:35  rm: cannot remove 'C:/workspace/openjdk-build/NOTICE': Permission denied

(Issue raised - linked below this comment)

[sxa]

run tests

[eclipse-temurin-bot]

 PR TESTER RESULT 

❎ Some pipelines failed or the job was aborted! ❎
See the pipeline-build-check below for more information...

[karianna]

As far as I can tell the builds passed but there was a Jenkins failure to report back some of the SUCCESS statuses