Bump Spring Boot 4 to M2 #5008

Job	Run time
system-test (sentry-samples-spring-boot, false, true)	2m 3s
system-test (sentry-samples-spring-boot-jakarta, false, true)	2m 33s
system-test (sentry-samples-spring-boot-opentelemetry, true, true)	4m 42s
system-test (sentry-samples-spring-boot-opentelemetry, true, false)	4m 43s
system-test (sentry-samples-spring-boot-webflux-jakarta, false, true)	2m 19s
system-test (sentry-samples-spring-boot-webflux, false, true)	2m 20s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry, true, true)	5m 1s
system-test (sentry-samples-console, false, true)	1m 0s
system-test (sentry-samples-logback, false, true)	1m 8s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry, true, false)	5m 3s
system-test (sentry-samples-log4j2, false, true)	1m 15s
system-test (sentry-samples-jul, false, true)	1m 5s
system-test (sentry-samples-spring-boot-4-opentelemetry, true, false)	5m 52s
system-test (sentry-samples-spring-boot-4-webflux, false, true)	3m 30s
system-test (sentry-samples-spring-boot-4, false, true)	3m 29s
system-test (sentry-samples-spring-jakarta, false, true)	1m 57s
system-test (sentry-samples-spring-boot-4-opentelemetry, true, true)	5m 54s
system-test (sentry-samples-spring-boot-jakarta-opentelemetry-noagent, false, true)	4m 42s
system-test (sentry-samples-spring-boot-opentelemetry-noagent, false, true)	4m 41s
	1h 3m 17s

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