chore: bump version to 5.2.2-SNAPSHOT #6022

Job	Run time
sample_operators_tests (sample-operators/mysql-schema)	3m 40s
sample_operators_tests (sample-operators/webpage)	4m 9s
sample_operators_tests (sample-operators/leader-election)	3m 48s
sample_operators_tests (sample-operators/tomcat-operator)	3m 33s
	15m 10s

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