Everest-1312 [CLI] Deprecate `--operator.xtradb-cluster` flag #4183

Job	Run time
Check (1.24.x, false)	2m 3s
API Integration Tests (1.24.x, false)	1s
CLI Integration Tests (1.24.x, false)	1s
Test (1.24.x, false)	1s
CLI tests (test-all-operators) / CLI test-all-operators	8m 24s
CLI tests (test-mongo-operator) / CLI test-mongo-operator	9m 57s
CLI tests (test-namespaces) / CLI test-namespaces	10m 20s
CLI tests (test-pg-operator) / CLI test-pg-operator	8m 1s
CLI tests (test-pxc-operator) / CLI test-pxc-operator	7m 31s
Merge Gatekeeper	16s
	46m 35s

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