Update python-bitrot-jobs; remove periodic macros

Sync the builder and publisher configuration from python-jobs
to pythot-bitrot-jobs (as much as possible).

Remove unneeded macros related to periodic jobs.

Change-Id: Ib66ebe63269c1a42f29fdcb21e49ebd42673a8c8
Merge "Update python-bitrot-jobs; remove periodic macros"