Fix server requests metrics tags for 404s when initialPath ends with / #57229

Job	Run time
CI Sanity Check	33s
Attach pull request number	5s
Configure jobs	17s
Initial JDK 17 Build	9m 13s
Calculate Test Jobs	15s
Native Tests - Virtual Thread - Main	3m 32s
Kubernetes Tests - JDK ${{ matrix.java.name }}	0s
Quickstarts Compilation - JDK 17	5m 43s
Devtools Tests - JDK ${{ matrix.java.name }}	0s
JVM Tests - JDK 21	11m 18s
JVM Tests - JDK 17	11m 19s
JVM Integration Tests - JDK 17	20m 5s
Gradle Tests - JDK ${{ matrix.java.name }}	0s
Maven Tests - JDK ${{ matrix.java.name }}	0s
JVM Integration Tests - JDK 17 Windows	16m 16s
JVM Tests - JDK 17 Windows	13m 40s
Native Tests - Main	5m 33s
JVM Integration Tests - JDK 21	20m 28s
Native Tests - Data3	3m 49s
Native Tests - Data4	10m 12s
Native Tests - gRPC	4m 48s
Native Tests - Misc3	3m 42s
Native Tests - HTTP	7m 54s
Native Tests - Observability	12m 58s
Native Tests - Messaging1	18m 20s
Native Tests - Cache	4m 22s
Native Tests - Security2	4m 40s
MicroProfile TCKs Tests	0s
Platform Tests - JDK ${{ matrix.java.name }}	0s
Upload build stats to collector	0s
Build report	37s
	3h 9m 39s

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