improve: PrimaryUpdateAndCacheUtils locks, naming and doc improvements #5201

Job	Run time
check_format_and_unit_tests	1m 20s
build / Special integration tests (24)	1m 47s
build / Special integration tests (17)	1m 43s
build / Special integration tests (21)	1m 50s
build / integration_tests (24, 1.31.8) / Integration tests (24, 1.31.8, vertx)	20m 7s
build / integration_tests (24, 1.30.12) / Integration tests (24, 1.30.12, vertx)	20m 8s
build / integration_tests (21, 1.33.0) / Integration tests (21, 1.33.0, vertx)	20m 7s
build / integration_tests (21, 1.31.8) / Integration tests (21, 1.31.8, vertx)	20m 5s
build / integration_tests (17, 1.32.4) / Integration tests (17, 1.32.4, vertx)	20m 6s
build / integration_tests (24, 1.32.4) / Integration tests (24, 1.32.4, vertx)	20m 6s
build / integration_tests (21, 1.32.4) / Integration tests (21, 1.32.4, vertx)	20m 6s
build / integration_tests (24, 1.33.0) / Integration tests (24, 1.33.0, vertx)	20m 7s
build / integration_tests (17, 1.30.12) / Integration tests (17, 1.30.12, vertx)	20m 5s
build / integration_tests (17, 1.31.8) / Integration tests (17, 1.31.8, vertx)	20m 5s
build / integration_tests (17, 1.33.0) / Integration tests (17, 1.33.0, vertx)	20m 5s
build / httpclient-tests (jdk) / Integration tests (24, 1.32.0, jdk)	20m 5s
build / integration_tests (21, 1.30.12) / Integration tests (21, 1.30.12, vertx)	20m 5s
build / httpclient-tests (vertx) / Integration tests (24, 1.32.0, vertx)	20m 5s
build / httpclient-tests (jetty) / Integration tests (24, 1.32.0, jetty)	20m 5s
	5h 8m 7s

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