Modify Node::repair method for nodetool cluster repair #338

Job	Run time
CCM Integration tests (using Nix) / build	15m 33s
CCM Integration tests / build (3.8)	8m 12s
CCM Integration tests / build (3.11)	7m 50s
CCM Integration tests / build (3.12)	7m 35s
	39m 10s

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