WebSockets Next: CloseReason - fix NPE if connection terminated abruptly #1737

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CI Sanity Check	31s
Initial JDK 17 Build	14m 29s
Calculate Test Jobs	11s
JVM Tests - JDK 17	8m 59s
JVM Tests - JDK 21	8m 39s
Gradle Tests - JDK ${{ matrix.java.name }}	0s
JVM Tests - JDK 17 Windows	10m 44s
Maven Tests - JDK ${{ matrix.java.name }}	0s
Devtools Tests - JDK ${{ matrix.java.name }}	0s
Quickstarts Compilation - JDK 17	6m 22s
Kubernetes Tests - JDK ${{ matrix.java.name }}	0s
MicroProfile TCKs Tests	0s
Native Tests - Virtual Thread - ${{ matrix.category }}	0s
Native Tests - ${{ matrix.category }}	0s
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Build report	30s
	50m 25s

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