Do not reflect label names in request metrics' "route" label (grafana…

…#11551)

**Which issue(s) this PR fixes**:
Fixes grafana#11549

(cherry picked from commit 18ea388)

CHANGELOG.md

@@ -70,6 +70,7 @@
 * [11587](https://github.com/grafana/loki/pull/11587) **trevorwhitney** Fix semantics of label parsing logic of metrics and logs queries. Both only parse the first label if multiple extractions into the same label are requested.
 * [11776](https://github.com/grafana/loki/pull/11776) **ashwanthgoli** Background Cache: Fixes a bug that is causing the background queue size to be incremented twice for each enqueued item.
 * [11921](https://github.com/grafana/loki/pull/11921) **paul1r**: Parsing: String array elements were not being parsed correctly in JSON processing 
+* [11551](https://github.com/grafana/loki/pull/11551) **dannykopping** Do not reflect label names in request metrics' "route" label.
 
 ##### Changes