Expose ability to configure cert generator Job ttlSecondsAfterFinished. Set default to 30s.

[salonichf5]

Cherry pick commit for release 2.0.1

Release notes

If this PR introduces a change that affects users and needs to be mentioned in the release notes,
please add a brief note that summarizes the change.

Expose ability to configure cert generator Job ttlSecondsAfterFinished. Set default to 30s.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.74%. Comparing base (92aa93b) to head (615b7d6).
Report is 1 commits behind head on release-2.0.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-2.0    #3500      +/-   ##
===============================================
- Coverage        86.78%   86.74%   -0.04%     
===============================================
  Files              127      127              
  Lines            15079    15079              
  Branches            62       62              
===============================================
- Hits             13086    13080       -6     
- Misses            1841     1846       +5     
- Partials           152      153       +1     

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