Update runAQATests JDK repo & branch for jdk23+ version branching

[andrew-m-leonard]

jdk-23+ stablisation versions are now in jdk(head) repo, mirror branches, dev_jdkNN and release_jdkNN.
Update runAQATests() to pass the correct JDKRepo and JDKBranch params...

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[andrew-m-leonard]

Test openjdk23-pipeline with sanity & system tests: https://ci.adoptium.net/job/build-scripts/job/openjdk23-pipeline/53/console

[smlambert]

LGTM