Remove ApiStatus.Experimental annotations from check-in API #5314

Job	Run time
system-test (sentry-samples-spring-boot, false, true)	2m 54s
system-test (sentry-samples-spring-boot-jakarta, false, true)	3m 4s
system-test (sentry-samples-spring-boot-opentelemetry, true, false)	5m 26s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry, true, false)	5m 33s
system-test (sentry-samples-spring-boot-opentelemetry-noagent, false, true)	5m 18s
system-test (sentry-samples-console, false, true)	1m 30s
system-test (sentry-samples-spring-boot-webflux, false, true)	3m 21s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry-noagent, false, true)	5m 36s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry, true, true)	5m 39s
system-test (sentry-samples-log4j2, false, true)	1m 23s
system-test (sentry-samples-spring-boot-opentelemetry, true, true)	5m 25s
system-test (sentry-samples-spring-boot-4-opentelemetry, true, true)	5m 40s
system-test (sentry-samples-spring-boot-webflux-jakarta, false, true)	2m 44s
system-test (sentry-samples-logback, false, true)	1m 27s
system-test (sentry-samples-spring-boot-4-webflux, false, true)	3m 20s
system-test (sentry-samples-spring-boot-4-opentelemetry, true, false)	5m 47s
system-test (sentry-samples-spring-boot-4, false, true)	3m 39s
system-test (sentry-samples-spring-jakarta, false, true)	2m 25s
system-test (sentry-samples-spring, false, true)	2m 20s
system-test (sentry-samples-jul, false, true)	1m 37s
	1h 14m 8s

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