Merge pull request #64719 from davidz627/feature/CSIv0.3

Automatic merge from submit-queue (batch tested with PRs 64276, 64094, 64719, 64766, 64750). 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>.

Upgrade container-storage-interface/spec dependency to v0.3.0

Also updated golang/protobuf to v1.1.0 to satisfy hard requirement of new CSI Spec version

/sig storage
/kind enhancement
/assign @saad-ali

```release-note
Updated Container Storage Interface specification version to v0.3.0
```

Kubernetes-commit: d12d8bd64bd25ce3a6bbda0dd43533cde359290b

vendor/k8s.io/api/extensions/v1beta1/generated.proto

@@ -51,6 +51,10 @@ message AllowedHostPath {
   // `/foo` would allow `/foo`, `/foo/` and `/foo/bar`
   // `/foo` would not allow `/food` or `/etc/foo`
   optional string pathPrefix = 1;
+
+  // when set to true, will allow host volumes matching the pathPrefix only if all volume mounts are readOnly.
+  // +optional
+  optional bool readOnly = 2;
 }
 
 message CustomMetricCurrentStatus {