add delete backup cmd using finalizer and simplify GC process

Signed-off-by: Steve Kriss <steve@heptio.com>

docs/cli-reference/ark.md

@@ -30,6 +30,7 @@ operations can also be performed as 'ark backup get' and 'ark schedule create'.
 ### SEE ALSO
 * [ark backup](ark_backup.md)	 - Work with backups
 * [ark create](ark_create.md)	 - Create ark resources
+* [ark delete](ark_delete.md)	 - Delete ark resources
 * [ark describe](ark_describe.md)	 - Describe ark resources
 * [ark get](ark_get.md)	 - Get ark resources
 * [ark plugin](ark_plugin.md)	 - Work with plugins

docs/cli-reference/ark_backup.md

@@ -29,6 +29,7 @@ Work with backups
 ### SEE ALSO
 * [ark](ark.md)	 - Back up and restore Kubernetes cluster resources.
 * [ark backup create](ark_backup_create.md)	 - Create a backup
+* [ark backup delete](ark_backup_delete.md)	 - Delete a backup
 * [ark backup describe](ark_backup_describe.md)	 - Describe backups
 * [ark backup download](ark_backup_download.md)	 - Download a backup
 * [ark backup get](ark_backup_get.md)	 - Get backups

docs/cli-reference/ark_backup_delete.md

@@ -0,0 +1,35 @@
+## ark backup delete
+
+Delete a backup
+
+### Synopsis
+
+
+Delete a backup
+
+```
+ark backup delete NAME [flags]
+```
+
+### Options
+
+```
+  -h, --help   help for delete
+```
+
+### Options inherited from parent commands
+
+```
+      --alsologtostderr                  log to standard error as well as files
+      --kubeconfig string                Path to the kubeconfig file to use to talk to the Kubernetes apiserver. If unset, try the environment variable KUBECONFIG, as well as in-cluster configuration
+      --log_backtrace_at traceLocation   when logging hits line file:N, emit a stack trace (default :0)
+      --log_dir string                   If non-empty, write log files in this directory
+      --logtostderr                      log to standard error instead of files
+      --stderrthreshold severity         logs at or above this threshold go to stderr (default 2)
+  -v, --v Level                          log level for V logs
+      --vmodule moduleSpec               comma-separated list of pattern=N settings for file-filtered logging
+```
+
+### SEE ALSO
+* [ark backup](ark_backup.md)	 - Work with backups
+

docs/cli-reference/ark_delete.md

@@ -0,0 +1,32 @@
+## ark delete
+
+Delete ark resources
+
+### Synopsis
+
+
+Delete ark resources
+
+### Options
+
+```
+  -h, --help   help for delete
+```
+
+### Options inherited from parent commands
+
+```
+      --alsologtostderr                  log to standard error as well as files
+      --kubeconfig string                Path to the kubeconfig file to use to talk to the Kubernetes apiserver. If unset, try the environment variable KUBECONFIG, as well as in-cluster configuration
+      --log_backtrace_at traceLocation   when logging hits line file:N, emit a stack trace (default :0)
+      --log_dir string                   If non-empty, write log files in this directory
+      --logtostderr                      log to standard error instead of files
+      --stderrthreshold severity         logs at or above this threshold go to stderr (default 2)
+  -v, --v Level                          log level for V logs
+      --vmodule moduleSpec               comma-separated list of pattern=N settings for file-filtered logging
+```
+
+### SEE ALSO
+* [ark](ark.md)	 - Back up and restore Kubernetes cluster resources.
+* [ark delete backup](ark_delete_backup.md)	 - Delete a backup
+

docs/cli-reference/ark_delete_backup.md

@@ -0,0 +1,35 @@
+## ark delete backup
+
+Delete a backup
+
+### Synopsis
+
+
+Delete a backup
+
+```
+ark delete backup NAME [flags]
+```
+
+### Options
+
+```
+  -h, --help   help for backup
+```
+
+### Options inherited from parent commands
+
+```
+      --alsologtostderr                  log to standard error as well as files
+      --kubeconfig string                Path to the kubeconfig file to use to talk to the Kubernetes apiserver. If unset, try the environment variable KUBECONFIG, as well as in-cluster configuration
+      --log_backtrace_at traceLocation   when logging hits line file:N, emit a stack trace (default :0)
+      --log_dir string                   If non-empty, write log files in this directory
+      --logtostderr                      log to standard error instead of files
+      --stderrthreshold severity         logs at or above this threshold go to stderr (default 2)
+  -v, --v Level                          log level for V logs
+      --vmodule moduleSpec               comma-separated list of pattern=N settings for file-filtered logging
+```
+
+### SEE ALSO
+* [ark delete](ark_delete.md)	 - Delete ark resources
+