Convert logging-gelf to use @ConfigMapping #49417

Job	Run time
Attach pull request number	4s
CI Sanity Check	31s
Initial JDK 17 Build	7m 14s
Calculate Test Jobs	9s
JVM Tests - JDK 17	4m 37s
JVM Tests - JDK 21	4m 48s
Gradle Tests - JDK ${{ matrix.java.name }}	0s
JVM Tests - JDK 17 Windows	5m 58s
Devtools Tests - JDK ${{ matrix.java.name }}	0s
Maven Tests - JDK ${{ matrix.java.name }}	0s
Quickstarts Compilation - JDK 17	6m 17s
Kubernetes Tests - JDK ${{ matrix.java.name }}	0s
MicroProfile TCKs Tests	0s
Native Tests - Misc2	5m 10s
Native Tests - Virtual Thread - ${{ matrix.category }}	0s
Upload build stats to collector	0s
Build report	40s
	35m 28s

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