WebSockets Next: add test for virtual threads #40583

Job	Run time
CI Sanity Check	31s
Attach pull request number	2s
Initial JDK 17 Build	13m 57s
Calculate Test Jobs	8s
JVM Tests - JDK 17	6m 19s
JVM Tests - JDK 21	6m 47s
Gradle Tests - JDK ${{ matrix.java.name }}	0s
Devtools Tests - JDK ${{ matrix.java.name }}	0s
Maven Tests - JDK ${{ matrix.java.name }}	0s
JVM Tests - JDK 17 Windows	6m 4s
Kubernetes Tests - JDK ${{ matrix.java.name }}	0s
Quickstarts Compilation - JDK 17	5m 43s
MicroProfile TCKs Tests	0s
Native Tests - ${{ matrix.category }}	0s
Native Tests - Virtual Thread - ${{ matrix.category }}	0s
Build report	28s
	39m 59s

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