[GroupDataProvider] Zero-initialize KeySet::epoch_keys in constructors (backport #71779)#72372
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[GroupDataProvider] Zero-initialize KeySet::epoch_keys in constructors (backport #71779)#72372mergify[bot] wants to merge 1 commit into
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Summary
Currently
GroupDataProvider::KeySetconstructors leaveepoch_keysuninitialized, this was the root cause of [MSan Bugfix] Fix uninitialized epoch start time in GroupcastCluster::SetKeySet #71585.make
GroupDataProvider::KeySetsafer by ensuring that epoch keys are initialized, by callingClearKeys()in all constructors.In addition, make sure
GroupDataProviderImpl::SetKeySetonly sets epoch keys for keys that are actually usedTesting
This is an automatic backport of pull request #71779 done by [Mergify](https://mergify.com).