fn framework -- add support for patch templates

kyaml/fn/framework/patchtestdata/longlistpreprocess/expected.yaml

@@ -0,0 +1,39 @@
+# Copyright 2019 The Kubernetes Authors.
+# SPDX-License-Identifier: Apache-2.0
+
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: test-1
+  annotations:
+    baz: foo
+    long: 'true'
+    patched: 'a'
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: example/sidecar:b
+---
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: test-2
+  annotations:
+    foo: bar
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: test-3
+  annotations:
+    foo: bar
+    long: 'true'
+    patched: 'a'
+spec:
+  template:
+    spec:
+      containers:
+      - name: foo
+        image: example/sidecar:b