Promote watch e2e test to conformance

test/conformance/testdata/conformance.txt

@@ -6,6 +6,10 @@ test/e2e/apimachinery/garbage_collector.go: "should orphan RS created by deploym
 test/e2e/apimachinery/garbage_collector.go: "should keep the rc around until all its pods are deleted if the deleteOptions says so"
 test/e2e/apimachinery/garbage_collector.go: "should not delete dependents that have both valid owner and owner that's waiting for dependents to be deleted"
 test/e2e/apimachinery/garbage_collector.go: "should not be blocked by dependency circle"
+test/e2e/apimachinery/watch.go: "should observe add, update, and delete watch notifications on configmaps"
+test/e2e/apimachinery/watch.go: "should be able to start watching from a specific resource version"
+test/e2e/apimachinery/watch.go: "should be able to restart watching from the last resource version observed by the previous watch"
+test/e2e/apimachinery/watch.go: "should observe an object deletion if it stops meeting the requirements of the selector"
 test/e2e/apps/daemon_set.go: "should run and stop simple daemon"
 test/e2e/apps/daemon_set.go: "should run and stop complex daemon"
 test/e2e/apps/daemon_set.go: "should retry creating failed daemon pods"