docs: add page to describe cache access model #5567

Job	Run time
check_format_and_unit_tests	1m 17s
build / Special integration tests (17)	2m 10s
build / Special integration tests (24)	1m 45s
build / Special integration tests (21)	1m 54s
build / httpclient-tests (vertx) / Integration tests (24, 1.32.0, vertx)	21m 49s
build / httpclient-tests (jdk) / Integration tests (24, 1.32.0, jdk)	22m 8s
build / integration_tests (21, 1.30.12) / Integration tests (21, 1.30.12, vertx)	22m 14s
build / httpclient-tests (jetty) / Integration tests (24, 1.32.0, jetty)	22m 17s
build / integration_tests (17, 1.32.4) / Integration tests (17, 1.32.4, vertx)	23m 20s
build / integration_tests (21, 1.32.4) / Integration tests (21, 1.32.4, vertx)	23m 30s
build / integration_tests (21, 1.31.8) / Integration tests (21, 1.31.8, vertx)	23m 51s
build / integration_tests (24, 1.33.1) / Integration tests (24, 1.33.1, vertx)	23m 16s
build / integration_tests (17, 1.31.8) / Integration tests (17, 1.31.8, vertx)	23m 46s
build / integration_tests (24, 1.32.4) / Integration tests (24, 1.32.4, vertx)	23m 3s
build / integration_tests (24, 1.30.12) / Integration tests (24, 1.30.12, vertx)	22m 4s
build / integration_tests (21, 1.33.1) / Integration tests (21, 1.33.1, vertx)	22m 45s
build / integration_tests (17, 1.33.1) / Integration tests (17, 1.33.1, vertx)	24m 23s
build / integration_tests (17, 1.30.12) / Integration tests (17, 1.30.12, vertx)	22m 4s
build / integration_tests (24, 1.31.8) / Integration tests (24, 1.31.8, vertx)	23m 56s
	5h 51m 32s

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