[do not merge] Weekly r192 with memberlist cluster label#189

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replay wants to merge 11 commits intoweekly-r192from weekly-r192-with-memberlist-cluster-label

+194-71

Commits on Jul 8, 2022

use version of memberlist with fix "skip label check"
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expose memberlist label options
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create unit tests which test clusters of using labels
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linter
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more specific error check
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Code review changes

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Renamed 'cluster-label-verification-enabled' to 'cluster-label-verification-disabled'

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Increase the number of nodes to gossip to, in order to speed up propagation in unit tests

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Update kv/memberlist/memberlist_client.go

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