Fix ObservabilityDevServicesConfigBuildItem usage - can be multiple, fix dup logging output #46184

Job	Run time
CI Sanity Check	32s
Attach pull request number	5s
Initial JDK 17 Build	7m 57s
Calculate Test Jobs	9s
JVM Tests - JDK 17	4m 44s
JVM Tests - JDK 21	4m 17s
Maven Tests - JDK ${{ matrix.java.name }}	0s
JVM Tests - JDK 17 Windows	5m 4s
Gradle Tests - JDK ${{ matrix.java.name }}	0s
Devtools Tests - JDK ${{ matrix.java.name }}	0s
Quickstarts Compilation - JDK 17	6m 30s
Kubernetes Tests - JDK ${{ matrix.java.name }}	0s
Native Tests - ${{ matrix.category }}	0s
MicroProfile TCKs Tests	0s
Native Tests - Virtual Thread - ${{ matrix.category }}	0s
Upload build stats to collector	0s
Build report	44s
	30m 2s

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