add new service APM to metadata

Reviewed-by: Gode, Sebastian <sebastian.gode@t-systems.com>
Co-authored-by: tischrei <tino.schreiber@t-systems.com>
Co-committed-by: tischrei <tino.schreiber@t-systems.com>

otc_metadata/data/documents/apm-api-ref.yaml

@@ -0,0 +1,10 @@
+---
+environment: internal
+hc_location: api/apm
+html_location: docs/apm/api-ref
+link: /application-performance-management/api-ref/
+pdf_name: apm-api-ref
+rst_location: api-ref/source
+service_type: apm
+title: API Reference
+type: api-ref

otc_metadata/data/documents/apm-umn.yaml

@@ -0,0 +1,10 @@
+---
+environment: internal
+hc_location: usermanual/apm
+html_location: docs/apm/umn
+link: /application-performance-management/umn/
+pdf_name: apm-umn
+rst_location: umn/source
+service_type: apm
+title: User Guide
+type: umn