feat(k8sexporter/problemclient): allow deletion of deprecated condition types

[daveoy]

this PR adds two flags,

1. enable deprecated condition type deletion (bool, defaults to false)
2. a CSV-string of condition type names to delete (string, ignored if 1 is false)

if enabled and given a string, on problemclient initialization we loop over the .status.conditions field of our node and recreate the list without the types present in the new switch (2) outlined above. we update .status.conditions with the new list (patching doesn't work here)

closes #1011

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[daveoy]

@wangzhen127 can I get an ok-to-test?

[wangzhen127]

/ok-to-test

[daveoy]

/retest

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/close

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@k8s-triage-robot: Closed this PR.

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