Add weekly tests to ea pipelines

[adamfarley]

To achieve the title goal, we should add a "Weekly without Publish" to the build pipelines.

In the long run we should find a neater way to run ea specific-tagged-level build testing. Perhaps when all of Adoptium's builds are ea (and nightly/weekly becomes an unused concept), we could have a single test list for all builds.

This seems a good solution in the short term though.

Testing here: https://ci.adoptium.net/job/build-scripts/job/openjdk21-pipeline/183/

And the "without publish" should work to prevent publishing by avoiding the triggering of this code here.

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[andrew-m-leonard]

lgtm