Update service port naming inline with istio naming conventions

https://istio.io/docs/ops/deployment/requirements/

Change http -> https for webhook port name

Author: sravankumar777

config/400-controller-service.yaml

@@ -21,7 +21,7 @@ metadata:
   namespace: tekton-pipelines
 spec:
   ports:
-  - name: metrics
+  - name: http-metrics
     port: 9090
     protocol: TCP
     targetPort: 9090

config/400-webhook-service.yaml

@@ -21,7 +21,8 @@ metadata:
   namespace: tekton-pipelines
 spec:
   ports:
-    - port: 443
+    - name: https-webhook
+      port: 443
       targetPort: 8443
   selector:
     app: tekton-pipelines-webhook