Accept STF sha in test pipeline

[llxia]

In order to support Reproducible Tests , our test pipeline should accept STF sha from STF repo. The user/upstream should be able to set STF sha. The test pipeline will use STF sha if it is provided. If not, the branch will be used.

In order to avoid parameter explosion, we should reuse STF_OWNER_BRANCH, so it can be
<owner>:<branch>, <owner>:<tag>, or <owner>:<sha>. SImilar to PR #2829 (get.sh change)

In this case, code needs to be updated in ant:
https://github.com/adoptium/aqa-tests/blob/master/system/common.xml#L51

Please make sure to test both in local and Grinder.

[xius666]

I would like to take this issue thanks

[llxia]

This issue is resolved.