Merge pull request #63811 from chuckha/list-images

Automatic merge from submit-queue (batch tested with PRs 63272, 63782, 63715, 63811, 63803). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Refactor kubeadm config list-images

In preparation for creating a `kubeadm config images pull`
this commit refactors `kubeadm config list-images` into
`kubeadm config images list`.

Signed-off-by: Chuck Ha <ha.chuck@gmail.com>

**What this PR does / why we need it**:
Prepares the `kubeadm config images` subcommand so we can add more functionality to it.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Related to kubernetes/kubeadm#812

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

docs/.generated_docs

@@ -58,7 +58,8 @@ docs/admin/kubeadm_alpha_phase_selfhosting_convert-from-staticpods.md
 docs/admin/kubeadm_alpha_phase_upload-config.md
 docs/admin/kubeadm_completion.md
 docs/admin/kubeadm_config.md
-docs/admin/kubeadm_config_list-images.md
+docs/admin/kubeadm_config_images.md
+docs/admin/kubeadm_config_images_list.md
 docs/admin/kubeadm_config_upload.md
 docs/admin/kubeadm_config_upload_from-file.md
 docs/admin/kubeadm_config_upload_from-flags.md
@@ -133,7 +134,8 @@ docs/man/man1/kubeadm-alpha-phase-upload-config.1
 docs/man/man1/kubeadm-alpha-phase.1
 docs/man/man1/kubeadm-alpha.1
 docs/man/man1/kubeadm-completion.1
-docs/man/man1/kubeadm-config-list-images.1
+docs/man/man1/kubeadm-config-images-list.1
+docs/man/man1/kubeadm-config-images.1
 docs/man/man1/kubeadm-config-upload-from-file.1
 docs/man/man1/kubeadm-config-upload-from-flags.1
 docs/man/man1/kubeadm-config-upload.1

docs/man/man1/kubeadm-config-images-list.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/man/man1/kubeadm-config-images.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.