Remove ApiStatus.Experimental annotations from check-in API #5304

Job	Run time
system-test (sentry-samples-spring-boot-jakarta, false, true)	3m 38s
system-test (sentry-samples-spring-boot, false, true)	3m 47s
system-test (sentry-samples-spring-boot-opentelemetry, true, false)	6m 14s
system-test (sentry-samples-logback, false, true)	2m 7s
system-test (sentry-samples-console, false, true)	2m 10s
system-test (sentry-samples-spring-boot-opentelemetry, true, true)	6m 22s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry, true, true)	6m 23s
system-test (sentry-samples-spring-boot-webflux-jakarta, false, true)	3m 48s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry-noagent, false, true)	6m 19s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry, true, false)	6m 27s
system-test (sentry-samples-spring-boot-4, false, true)	3m 33s
system-test (sentry-samples-spring, false, true)	2m 45s
system-test (sentry-samples-jul, false, true)	2m 1s
system-test (sentry-samples-log4j2, false, true)	2m 8s
system-test (sentry-samples-spring-boot-webflux, false, true)	3m 39s
system-test (sentry-samples-spring-jakarta, false, true)	2m 46s
system-test (sentry-samples-spring-boot-4-opentelemetry, true, true)	6m 29s
system-test (sentry-samples-spring-boot-4-webflux, false, true)	3m 43s
system-test (sentry-samples-spring-boot-opentelemetry-noagent, false, true)	6m 10s
system-test (sentry-samples-spring-boot-4-opentelemetry, true, false)	6m 30s
	1h 26m 59s

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