Enhance SubscriptionStatus orphans cleanup by implementing increasing…

[mikeshng]

… the frequency of the cleanup with a cap of 1 hr interval

for https://issues.redhat.com/browse/ACM-2767

Signed-off-by: Mike Ng ming@redhat.com

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[mikeshng]

/hold

for more testing.

@xiangjingli I couldn't use the backoff function you recommended because it will terminate (backoff) eventually. I think we need this function to run forever in the background but at the max 1 hr interval as discussed. I couldn't find other wait function that has the cap interval and the backoff unfortunately has the cap but it terminates.

[mikeshng]

/unhold

I can see from the logs the cleanup is taking place at the pace we want it.

[xiangjingli]

/lgtm