fix(titus): Set default disruption budget based on job type

[aravindmd]

Titus batch jobs submitted through a Run Job pipeline stage defaults to a global default policy, This policy is well suited for services, but inappropriate for batch jobs as it allows to kill running batch jobs, Setting it to self-managed is a better option since this has the setting on Titus to not disrupt the jobs.

[aravindmd]

Confirmed with Titus , this should work fine.

[robzienert]

Would do well to have a test for this.

[aravindmd]

Would do well to have a test for this.

Agree , will look at adding one