Showcase conformance images options in the manifest

The Dockerfile has a few more options, let's surface that in the
manifest. Also use the same defaults in the manifest as the Dockerfile
itself.

Change-Id: Ib7419cf7999430db15f39ac414c80ee362fcda76

cluster/images/conformance/conformance-e2e.yaml

@@ -59,7 +59,13 @@ spec:
     imagePullPolicy: IfNotPresent
     env:
     - name: E2E_FOCUS
-      value: "Pods should be submitted and removed"
+      value: "\\[Conformance\\]"
+    - name: E2E_SKIP
+      value: "Alpha|\\[(Disruptive|Feature:[^\\]]+|Flaky)\\]"
+    - name: E2E_PROVIDER
+      value: "local"
+    - name: E2E_PARALLEL
+      value: "y"
     volumeMounts:
     - name: output-volume
       mountPath: /tmp/results