Add support for demoting tests only if they failed on N subsequent days/weeks at least K times

[shalinmangar]

We have support for a promote_if_not_failed_days configuration parameter which is used to promote tests to the clean room provided they have not appeared in the jenkins failure reports for the last N days and can pass all filters. However, we do not have a corresponding feature to demote tests only if they failed in the last N days or weeks or failed K times in a given date interval.