4.x: Add optional fallback for `ControlConnection#reconnect()` #681

Job	Run time
Setup ITs	4s
Unit tests (8)	1m 20s
Full verify (8)	22s
Build (8)	1m 59s
Scylla ITs (ENTERPRISE-RELEASE, 8)	1m 37s
Cassandra ITs (RELEASE-3.X, 8)	1m 36s
Scylla ITs (ENTERPRISE-PRIOR-RELEASE, 8)	1m 43s
Cassandra ITs (RELEASE-4.X, 8)	1m 36s
Scylla ITs (OSS-RELEASE, 8)	1m 44s
Scylla ITs (OSS-PRIOR-RELEASE, 8)	1m 47s
	13m 48s

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