Add span based feature flags #5713

Job	Run time
system-test (sentry-samples-spring-boot, false, true)	7m 37s
system-test (sentry-samples-spring-boot-opentelemetry-noagent, false, true)	9m 11s
system-test (sentry-samples-spring-boot-webflux-jakarta, false, true)	5m 36s
system-test (sentry-samples-console, false, true)	3m 32s
system-test (sentry-samples-spring-boot-opentelemetry, true, true)	8m 9s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry, true, false)	8m 29s
system-test (sentry-samples-spring-boot-webflux, false, true)	7m 5s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry-noagent, false, true)	7m 50s
system-test (sentry-samples-spring-boot-opentelemetry, true, false)	8m 19s
system-test (sentry-samples-log4j2, false, true)	4m 57s
system-test (sentry-samples-spring-boot-jakarta, false, true)	6m 47s
system-test (sentry-samples-spring-boot-4-opentelemetry, true, true)	11m 5s
system-test (sentry-samples-spring-boot-4-webflux, false, true)	8m 10s
system-test (sentry-samples-spring-boot-4, false, true)	7m 41s
system-test (sentry-samples-spring-7, false, true)	7m 14s
system-test (sentry-samples-logback, false, true)	3m 40s
system-test (sentry-samples-spring-boot-4-opentelemetry, true, false)	8m 22s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry, true, true)	11m 6s
system-test (sentry-samples-jul, false, true)	5m 1s
system-test (sentry-samples-spring-jakarta, false, true)	6m 51s
system-test (sentry-samples-spring, false, true)	4m 45s
	2h 31m 27s

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