Merge pull request #47987 from wongma7/reclaimpolicy

Automatic merge from submit-queue (batch tested with PRs 49869, 47987, 50211, 50804, 50583)

Add ReclaimPolicy field to StorageClass

fix https://github.com/kubernetes/kubernetes/issues/38192, enough people want this imo so going ahead and adding it according to initial suggested design

some considerations:
* No Recycle allowed, Retain (& Delete) only.
* Do we need to gate the field.
* E2E test where a Retain PV is dynamically provisioned is TODO if we agree we want this & this is the way to do it.
* Need a feature repo issue to track docs and stuff for 1.8

**Release note**:

```release-note
StorageClass has a new field to configure reclaim policy of dynamically provisioned PVs.
```

api/swagger-spec/storage.k8s.io_v1.json

@@ -716,6 +716,10 @@
      "parameters": {
       "type": "object",
       "description": "Parameters holds the parameters for the provisioner that should create volumes of this storage class."
+     },
+     "reclaimPolicy": {
+      "$ref": "v1.PersistentVolumeReclaimPolicy",
+      "description": "Dynamically provisioned PersistentVolumes of this storage class are created with this reclaimPolicy. Defaults to Delete."
      }
     }
    },
@@ -957,6 +961,10 @@
      }
     }
    },
+   "v1.PersistentVolumeReclaimPolicy": {
+    "id": "v1.PersistentVolumeReclaimPolicy",
+    "properties": {}
+   },
    "v1.WatchEvent": {
     "id": "v1.WatchEvent",
     "required": [

api/swagger-spec/storage.k8s.io_v1beta1.json

@@ -716,6 +716,10 @@
      "parameters": {
       "type": "object",
       "description": "Parameters holds the parameters for the provisioner that should create volumes of this storage class."
+     },
+     "reclaimPolicy": {
+      "$ref": "v1.PersistentVolumeReclaimPolicy",
+      "description": "Dynamically provisioned PersistentVolumes of this storage class are created with this reclaimPolicy. Defaults to Delete."
      }
     }
    },
@@ -957,6 +961,10 @@
      }
     }
    },
+   "v1.PersistentVolumeReclaimPolicy": {
+    "id": "v1.PersistentVolumeReclaimPolicy",
+    "properties": {}
+   },
    "v1.WatchEvent": {
     "id": "v1.WatchEvent",
     "required": [