Enable dev.openjdk on only Linux platforms

[Mesbah-Alam]

• Enable dev.openjdk on only Linux platforms
• Related to upstream change: Set lightweight checkout in DSLs adoptium/ci-jenkins-pipelines#57

Signed-off-by: Mesbah Alam [email protected]

[github-actions]

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[Mesbah-Alam]

@AdamBrousseau - please review.

[Mesbah-Alam]

Spoke to Shelley about this. She suggested that this change should happen at upstream, in https://github.com/adoptium/ci-jenkins-pipelines. Otherwise there could be merge conflicts next time we pull changes from upstream. Moving this PR to draft for now.