feat(envelope-item): Support span type #6135

Job	Run time
system-test (sentry-samples-spring-boot-opentelemetry, true, false)	6m 16s
system-test (sentry-samples-spring-boot-opentelemetry, true, true)	6m 17s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry-noagent, false, true)	6m 31s
system-test (sentry-samples-logback, false, true)	2m 1s
system-test (sentry-samples-spring-boot-webflux, false, true)	3m 34s
system-test (sentry-samples-spring-boot-webflux-jakarta, false, true)	3m 34s
system-test (sentry-samples-spring-boot-opentelemetry-noagent, false, true)	6m 4s
system-test (sentry-samples-spring-boot-4, false, true)	3m 33s
system-test (sentry-samples-console, false, true)	1m 54s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry, true, false)	6m 48s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry, true, true)	6m 41s
system-test (sentry-samples-spring-boot-jakarta, false, true)	5m 45s
system-test (sentry-samples-spring-boot, false, true)	3m 42s
system-test (sentry-samples-jul, false, true)	2m 11s
system-test (sentry-samples-spring-boot-4-opentelemetry, true, true)	6m 30s
system-test (sentry-samples-log4j2, false, true)	1m 50s
system-test (sentry-samples-spring, false, true)	3m 0s
system-test (sentry-samples-spring-boot-4-webflux, false, true)	3m 35s
system-test (sentry-samples-spring-boot-4-opentelemetry, true, false)	6m 35s
system-test (sentry-samples-spring-7, false, true)	3m 9s
system-test (sentry-samples-spring-jakarta, false, true)	3m 16s
	1h 32m 46s

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