OSPool: refactoring cm/ccb, enable live reconfig

[rynge]

The driver for this is to enable automatic live reconfig, based on the osg-flock repo. Changes to the repo will be picked up with in 5 minutes, update image config, and issue a condor_reconfig.

• Split the current image, used for both CCB and CM, to separate images.
• Moved the image init script from the Tiger k8s config, to be hosted inside the image. The CM and CCB images have different versions.
• Added cron jobs to check if the local checkout is trailing the osg-flock repo. This is all done by rerunning the image init script from cron.
• Updated old ref to OSG 23.

Tested in Nautilus ITB.

[matyasselmeci]

I think this is fine aside from my two comments; another thing that might be a good idea is to copy default-build-config.json to build-config.json in each of the image dirs and remove the values we're probably never going to use.