Added close handler on initial response for reactive SseEventSinkImpl #36708

Job	Run time
CI Sanity Check	31s
Attach pull request number	2s
Initial JDK 17 Build	13m 12s
Calculate Test Jobs	12s
Maven Tests - JDK 17	8m 35s
Maven Tests - JDK 17 Windows	11m 30s
Gradle Tests - JDK 17	24m 8s
Devtools Tests - JDK ${{ matrix.java.name }}	0s
Gradle Tests - JDK 17 Windows	49m 5s
JVM Tests - JDK 17	1h 50m 35s
JVM Tests - JDK 21	2h 13m 3s
JVM Tests - JDK 17 Windows	1h 58m 58s
Quickstarts Compilation - JDK 17	5m 50s
Kubernetes Tests - JDK 17	12m 49s
Kubernetes Tests - JDK 21	12m 16s
MicroProfile TCKs Tests	10m 18s
Kubernetes Tests - JDK 17 Windows	14m 57s
Native Tests - Main	6m 46s
Native Tests - Virtual Thread - Main	22m 44s
Native Tests - Data1	30m 59s
Native Tests - Virtual Thread - Messaging	10m 14s
Native Tests - Data2	26m 16s
Native Tests - Data3	21m 38s
Native Tests - Data4	20m 8s
Native Tests - Data5	15m 6s
Native Tests - Data6	20m 30s
Native Tests - Data7	25m 29s
Native Tests - Amazon	4m 9s
Native Tests - Messaging1	23m 57s
Native Tests - Security2	16m 46s
Native Tests - Security3	9m 48s
Native Tests - Cache	12m 9s
Native Tests - HTTP	23m 45s
Native Tests - Misc1	10m 50s
Native Tests - Misc2	6m 0s
Native Tests - Misc3	22m 47s
Native Tests - Misc4	33m 59s
Native Tests - Spring	13m 11s
Native Tests - gRPC	13m 38s
Build report	42s
	15h 17m 32s

Provide feedback