chore: add 8.7 mirror shortnames + rewrite matrix doc per #6172

Author: bkenez

charts/camunda-platform-8.7/test/ci-test-config.yaml

@@ -178,6 +178,19 @@ integration:
           qa: true
           image-tags: true
           platforms: [gke]
+        # Mirrors 8.8+ shortname for the qa-elasticsearch-rba scenario; cross-component
+        # nightly playwright_sm_nightly_rba_8_7.yml passes shortname=qaelrba.
+        - name: qa-elasticsearch-rba
+          enabled: false
+          flow: install
+          shortname: qaelrba
+          auth: keycloak
+          identity: keycloak
+          persistence: elasticsearch
+          features: [rba]
+          qa: true
+          image-tags: true
+          platforms: [gke]
         - name: qa-elasticsearch-mt
           enabled: false
           flow: install
@@ -189,6 +202,32 @@ integration:
           qa: true
           image-tags: true
           platforms: [gke]
+        # Mirrors 8.8+ shortname for the qa-elasticsearch-mt scenario; cross-component
+        # nightly playwright_sm_nightly_mt_8_7.yml passes shortname=qaelmt.
+        - name: qa-elasticsearch-mt
+          enabled: false
+          flow: install
+          shortname: qaelmt
+          auth: keycloak
+          identity: keycloak
+          persistence: elasticsearch
+          features: [multitenancy]
+          qa: true
+          image-tags: true
+          platforms: [gke]
+        # Mirrors 8.8+ qa-document-store scenario; cross-component nightly
+        # playwright_sm_nightly_document_store_8_7.yml passes shortname=qadoc.
+        - name: qa-document-store
+          enabled: false
+          flow: install
+          shortname: qadoc
+          auth: keycloak
+          identity: keycloak
+          persistence: elasticsearch
+          features: [documentstore]
+          qa: true
+          image-tags: true
+          platforms: [gke, eks]
         - name: qa-license
           enabled: false
           flow: install