Add windows driver installation support

This PR adds windows driver support. It adds a windows base dir to
install base yaml files. It also adds a windows alpha kustomization
file. To install driver for windows, first set env
GCE_PD_DRIVER_VERSION=windows/alpha and run
deploy/kubernetes/deploy-driver-win.sh script.

Author: jingxu97

deploy/kubernetes/overlays/windows/alpha/disableHostNetwork.yaml

@@ -0,0 +1,8 @@
+kind: DaemonSet
+apiVersion: apps/v1
+metadata:
+  name: csi-gce-pd-node
+spec:
+  template:
+    spec:
+      hostNetwork: false

deploy/kubernetes/overlays/windows/alpha/gcepd.yaml

@@ -0,0 +1,82 @@
+kind: DaemonSet
+apiVersion: apps/v1
+metadata:
+  name: csi-gce-pd-node
+spec:
+  template:
+    spec:
+      containers:
+        - securityContext:
+            $patch: delete
+          name: gce-pd-driver
+          image: gke.gcr.io/gcp-compute-persistent-disk-csi-driver-win
+          volumeMounts:
+            - name: kubelet-dir
+              mountPath: C:\var\lib\kubelet
+              mountPropagation: "None"
+            - name: plugin-dir
+              mountPath: C:\csi
+            - name: csi-proxy-disk-pipe
+              mountPath: \\.\pipe\csi-proxy-disk-v1alpha1
+            - name: csi-proxy-volume-pipe
+              mountPath: \\.\pipe\csi-proxy-volume-v1alpha1
+            - name: csi-proxy-filesystem-pipe
+              mountPath: \\.\pipe\csi-proxy-filesystem-v1alpha1
+            - name: kubelet-dir
+              mountPath: /var/lib/kubelet
+              mountPropagation: "Bidirectional"
+              $patch: delete
+            - name: plugin-dir
+              mountPath: /csi
+              $patch: delete
+            - name: device-dir
+              mountPath: /dev
+              $patch: delete
+            - name: udev-rules-etc
+              mountPath: /etc/udev
+              $patch: delete
+            - name: udev-rules-lib
+              mountPath: /lib/udev
+              $patch: delete
+            - name: udev-socket
+              mountPath: /run/udev
+              $patch: delete
+            - name: sys
+              mountPath: /sys
+              $patch: delete
+      nodeSelector:
+        kubernetes.io/os: windows
+      volumes:
+      - name: csi-proxy-disk-pipe
+        hostPath:
+          path: \\.\pipe\csi-proxy-disk-v1alpha1
+          type: ""
+      - name: csi-proxy-volume-pipe
+        hostPath:
+          path: \\.\pipe\csi-proxy-volume-v1alpha1
+          type: ""
+      - name: csi-proxy-filesystem-pipe
+        hostPath:
+          path: \\.\pipe\csi-proxy-filesystem-v1alpha1
+          type: ""
+      - name: registration-dir
+        hostPath:
+          path: C:\var\lib\kubelet\plugins_registry\
+      - name: kubelet-dir
+        hostPath:
+          path: C:\var\lib\kubelet\
+      - name: plugin-dir
+        hostPath:
+          path: C:\var\lib\kubelet\plugins\pd.csi.storage.gke.io\
+      - $patch: delete
+        name: device-dir
+        # The following mounts are required to trigger host udevadm from
+        # container
+      - $patch: delete
+        name: udev-rules-etc
+      - name: udev-rules-lib
+        $patch: delete
+      - name: udev-socket
+        $patch: delete
+      - name: sys
+        $patch: delete

deploy/kubernetes/overlays/windows/alpha/kustomization.yaml

@@ -0,0 +1,34 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+bases:
+- ../../../base
+patchesStrategicMerge:
+- disableHostNetwork.yaml
+- gcepd.yaml
+- noderegistrar.yaml
+images:
+- name: gke.gcr.io/gcp-compute-persistent-disk-csi-driver
+  # Don't change stable image without changing pdImagePlaceholder in
+  # test/k8s-integration/main.go
+  newName: gke.gcr.io/gcp-compute-persistent-disk-csi-driver
+  newTag: "v0.7.0-gke.0"
+- name: gke.gcr.io/gcp-compute-persistent-disk-csi-driver-win
+  # Temporarly set to the private repo. Will swtich to public one
+  # once it is available.
+  newName: gcr.io/jing-k8s-dev/gce-pd-windows-2019
+  newTag: "0.2.0"
+- name: gke.gcr.io/csi-provisioner
+  newName: gke.gcr.io/csi-provisioner
+  newTag: "v1.5.0-gke.0"
+- name: gke.gcr.io/csi-attacher
+  newName: gke.gcr.io/csi-attacher
+  newTag: "v2.1.1-gke.0"
+- name: gke.gcr.io/csi-node-driver-registrar
+  newName: gcr.io/k8s-staging-csi/csi-node-driver-registrar
+  newTag: "amd64-windows-v20200428-v1.3.0-26-g510710d5"
+- name: gke.gcr.io/csi-resizer
+  newName: gke.gcr.io/csi-resizer
+  newTag: "v0.4.0-gke.0"
+- name: gke.gcr.io/csi-snapshotter
+  newName: gke.gcr.io/csi-snapshotter
+  newTag: "v2.1.1-gke.0"

deploy/kubernetes/overlays/windows/alpha/noderegistrar.yaml

@@ -0,0 +1,17 @@
+kind: DaemonSet
+apiVersion: apps/v1
+metadata:
+  name: csi-gce-pd-node
+spec:
+  template:
+    spec:
+      containers:
+        - name: csi-driver-registrar
+          args:
+            - --v=5
+            - --csi-address=unix://C:\\csi\\csi.sock
+            - --kubelet-registration-path=C:\\var\\lib\\kubelet\\plugins\\pd.csi.storage.gke.io\\csi.sock
+          lifecycle:
+              preStop:
+                exec:
+                  command: ["cmd", "/c", "del  C:\\registration\\pd.csi.storage.gke.io-reg.sock"]