Use default python3_version in 9-stream stable jobs

Stable branches missing fixes to support non default
PYTHON3_VERSION[1], stable branches works fine with
default PYTHON3_VERSION i.e 3.9, so created job
overrides for this.

[1] https://review.opendev.org/q/topic:%22bug/2109591%22

Change-Id: I5d14e85b7a7cf9a5a8a5073dc27785db8587ecbb
Signed-off-by: Yatin Karel <ykarel@redhat.com>
2 files changed