Add span based feature flags #5714

Job	Run time
system-test (sentry-samples-spring-boot, false, true)	5m 9s
system-test (sentry-samples-spring-boot-jakarta, false, true)	9m 5s
system-test (sentry-samples-spring-boot-webflux-jakarta, false, true)	7m 37s
system-test (sentry-samples-spring-boot-webflux, false, true)	5m 12s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry-noagent, false, true)	9m 47s
system-test (sentry-samples-logback, false, true)	3m 23s
system-test (sentry-samples-spring-boot-opentelemetry, true, true)	9m 37s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry, true, false)	9m 47s
system-test (sentry-samples-spring-boot-opentelemetry, true, false)	10m 3s
system-test (sentry-samples-console, false, true)	3m 14s
system-test (sentry-samples-spring-boot-opentelemetry-noagent, false, true)	8m 17s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry, true, true)	8m 16s
system-test (sentry-samples-spring-boot-4-opentelemetry, true, false)	8m 57s
system-test (sentry-samples-spring, false, true)	5m 34s
system-test (sentry-samples-spring-boot-4-opentelemetry, true, true)	8m 34s
system-test (sentry-samples-spring-7, false, true)	6m 42s
system-test (sentry-samples-jul, false, true)	3m 16s
system-test (sentry-samples-spring-boot-4-webflux, false, true)	5m 47s
system-test (sentry-samples-spring-boot-4, false, true)	7m 14s
system-test (sentry-samples-log4j2, false, true)	3m 25s
system-test (sentry-samples-spring-jakarta, false, true)	7m 36s
	2h 26m 32s

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