Merge pull request #41146 from shiywang/apply-view1

Automatic merge from submit-queue (batch tested with PRs 41146, 41486, 41482, 41538, 41784)

 Add apply view-last-applied subcommand

reopen pr https://github.com/kubernetes/kubernetes/pull/40984, implement part of https://github.com/kubernetes/community/pull/287
for now unit test all pass, the output looks like:

```console
shiywang@dhcp-140-33 template $ ./kubectl apply view last-applied deployment nginx-deployment 
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  creationTimestamp: null
  name: nginx-deployment
spec:
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx:1.12.10
        name: nginx
        ports:
        - containerPort: 80
        resources: {}
status: {}
```

```release-note
Support new kubectl apply view-last-applied command for viewing the last configuration file applied
```

not sure if there is any flag I should updated or the some error handling I should changed.
will generate docs when you guys think is ok.
cc @pwittrock @jessfraz @AdoHe @ymqytw

docs/.generated_docs

@@ -12,6 +12,7 @@ docs/man/man1/kube-proxy.1
 docs/man/man1/kube-scheduler.1
 docs/man/man1/kubectl-annotate.1
 docs/man/man1/kubectl-api-versions.1
+docs/man/man1/kubectl-apply-view-last-applied.1
 docs/man/man1/kubectl-apply.1
 docs/man/man1/kubectl-attach.1
 docs/man/man1/kubectl-autoscale.1
@@ -97,6 +98,7 @@ docs/user-guide/kubectl/kubectl.md
 docs/user-guide/kubectl/kubectl_annotate.md
 docs/user-guide/kubectl/kubectl_api-versions.md
 docs/user-guide/kubectl/kubectl_apply.md
+docs/user-guide/kubectl/kubectl_apply_view-last-applied.md
 docs/user-guide/kubectl/kubectl_attach.md
 docs/user-guide/kubectl/kubectl_autoscale.md
 docs/user-guide/kubectl/kubectl_certificate.md

docs/man/man1/kubectl-apply-view-last-applied.1

@@ -0,0 +1,3 @@
+This file is autogenerated, but we've stopped checking such files into the
+repository to reduce the need for rebases. Please run hack/generate-docs.sh to
+populate this file.

docs/user-guide/kubectl/kubectl_apply_view-last-applied.md

@@ -0,0 +1,3 @@
+This file is autogenerated, but we've stopped checking such files into the
+repository to reduce the need for rebases. Please run hack/generate-docs.sh to
+populate this file.