delete all the cronjobs if default config removed
delete all the cronjobs if default config removed

This deletes all the cronjobs created by the default config in the
tektoncofig or cronjobs creted by unique schedule value in the
form of annotation in the namespaces.

The behaviour now is if there is no prune config in the tektonconfig
then all the prune cronjobs must be deleted.

Signed-off-by: Pradeep Kumar <89f9c159ede6c6ccc410acc84b2d41fcb248aa60@redhat.com>

tektoncd/operator,tektoncd/operator,tektoncd/operator