Try to stabilize sealed class completion tests #11678

Job	Run time
Build Clusters on JDK 17	9m 26s
NetBeans on nb-javac	0s
Build Clusters on JDK 21	8m 31s
Build Clusters on JDK 24-ea	7m 54s
Build-System / Misc Tests on Linux/JDK 17	7m 1s
Check Paperwork on Linux/JDK 17	7m 8s
CV on ubuntu-latest/JDK 17	7m 9s
IDE Modules on Linux/JDK 17	6m 56s
CV on macos-latest/JDK 17	7m 10s
Build ${{ matrix.config }} from src.zip on JDK ${{ matrix.java }}	0s
Build-Tools on Linux/JDK ${{ matrix.java }}	0s
CV on windows-latest/JDK 17	7m 6s
Java Modules on Linux/JDK 17	5m 41s
Platform Modules batch1 on Linux/JDK ${{ matrix.java }} (some on 8)	0s
Platform Modules batch2 on Linux/JDK ${{ matrix.java }}	0s
CV on ubuntu-latest/JDK 23	7m 10s
Java Debugger tests on Linux/JDK 17	6m 25s
Java Hints batch1 on Linux/JDK 17	7m 7s
Profiler on Linux/JDK 17	1m 0s
JavaFX on Linux/JDK ${{ matrix.java }}	0s
Java Hints batch2 on Linux/JDK 17	7m 9s
Java Hints batch1 on Linux/JDK 23	7m 8s
Java Debugger tests on Linux/JDK 21	5m 38s
Java Hints batch2 on Linux/JDK 23	7m 9s
Java Debugger tests on Linux/JDK 24-ea	7m 7s
Web Modules on Linux/JDK ${{ matrix.java }}	0s
Groovy on Linux/JDK ${{ matrix.java }}	0s
Rust on Linux/JDK ${{ matrix.java }}	0s
Enterprise on Linux/JDK ${{ matrix.java }}	0s
DB Tests with MySQL on Linux/JDK ${{ matrix.java }}	0s
PHP on ${{ matrix.os }}/JDK ${{ matrix.java }}	0s
Versioning Modules on Linux/JDK ${{ matrix.java }}	0s
GraalVM ${{ matrix.graal }} Tests	0s
LSP tests on Linux/JDK ${{ matrix.java }}	0s
VSCode Extension Tests on JDK ${{ matrix.java }}	0s
Cleanup Workflow Artifacts	3s
	2h 9m 58s

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