Upgrade to kotlin 2 (#2054) #631

Job	Run time
release-notes	4s
build-libraries / build	9m 34s
build-examples / build	2m 42s
http-spec-compliance / http-spec-compliance (spring-server)	2m 1s
http-spec-compliance / http-spec-compliance (ktor-server)	1m 47s
federation-integration / compatibility	2m 54s
federation-integration / composition	2m 22s
graalvm-integration / graalvm-integration (ktor-graalvm-server)	6m 15s
graalvm-integration / graalvm-integration (maven-graalvm-server)	5m 50s
plugin-integration / gradle-integration-tests	3m 22s
graalvm-integration / graalvm-integration (spring-graalvm-server)	9m 0s
plugin-integration / android-test	3m 23s
plugin-integration / maven-integration-tests	4m 21s
	53m 35s

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