fix: timeout control and python39 splunk tests include in matrix (#192)

* fix: controlled timeout

* chore: add failure() condition to cancel test step to gracefully cancel job on argo

* chore: better handling for graceful timeout handling

* chore: debug print

* chore: continue-on-error on additional matrix element splunk python39

* chore: downgrade matrix-action to 1.10

* chore: align additional matrix element to correct yaml format

* chore: further alignments - move python39 to meta step

* chore: add fixed sc4s version for python39 tests

* chore: test sc4s version

* test: reference list element for sc4s matrix

* chore: update jobs for all tests, add graceful timeout mechanism

* fix: add missing parenthesis

* chore: pre-commit fixes