Add Alpha Support for Windows HostProcess Containers

[torredil]

Is this a bug fix or adding new feature?

Feature

What is this PR about? / Why do we need it?

This PR adds alpha support for running the driver node pod as a Windows HostProcess container. This is a new feature that allows the driver to directly access the host's Windows storage APIs to perform privileged storage operations without requiring the CSI Proxy binary.

Summary of Changes

• Add a new CSIProxyMounterV2 that implements the Mounter interface using direct csi-proxy/v2 API calls instead of the v1 gRPC client.
• Update NewNodeMounter to return a SafeFormatAndMount configured with either CSIProxyMounter or CSIProxyMounterV2 based on the windowsHostProcess parameter
• Add a node.windowsHostProcess configuration option to enable HostProcess mode.
• Add a new external-windows-hostprocess makefile target to test the feature in the CI environment.

What testing is done?

Manual

[github-actions]

Code Coverage Diff

File	Old Coverage	New Coverage	Delta
github.com/kubernetes-sigs/aws-ebs-csi-driver/pkg/cloud/metadata/k8s.go	80.0%	56.0%	-24.0
github.com/kubernetes-sigs/aws-ebs-csi-driver/pkg/util/util.go	80.0%	55.6%	-24.4

[torredil]

helm upgrade --install aws-ebs-csi-driver --namespace kube-system ./charts/aws-ebs-csi-driver --values ./charts/aws-ebs-csi-driver/values.yaml --set node.enableWindows=true --set node.windowsHostProcess=true

kubetest2 noop \
  --run-id="e2e-kubernetes" \
  --test=ginkgo \
  -- \
  --test-package-version=v1.29.0 \
  --skip-regex="\[Disruptive\]|\[Serial\]|\[LinuxOnly\]|\[Feature:VolumeSnapshotDataSource\]|\(xfs\)|\(ext4\)|\(block volmode\)" \
  --focus-regex="External.Storage" \
  --parallel=40 \
  --test-args="-storage.testdriver=/home/torredil/go/src/github.com/torredil/aws-ebs-csi-driver/tests/e2e-kubernetes/manifests.yaml" &

Ran 32 of 7692 Specs in 223.462 seconds
SUCCESS! -- 32 Passed | 0 Failed | 0 Pending | 7660 Skipped

helm upgrade --install aws-ebs-csi-driver --namespace kube-system ./charts/aws-ebs-csi-driver --values ./charts/aws-ebs-csi-driver/values.yaml --set node.enableWindows=true --set node.windowsHostProcess=false

kubetest2 noop \
  --run-id="e2e-kubernetes" \
  --test=ginkgo \
  -- \
  --test-package-version=v1.29.0 \
  --skip-regex="\[Disruptive\]|\[Serial\]|\[LinuxOnly\]|\[Feature:VolumeSnapshotDataSource\]|\(xfs\)|\(ext4\)|\(block volmode\)" \
  --focus-regex="External.Storage" \
  --parallel=40 \
  --test-args="-storage.testdriver=/home/torredil/go/src/github.com/torredil/aws-ebs-csi-driver/tests/e2e-kubernetes/manifests.yaml" &

Ran 32 of 7692 Specs in 247.136 seconds
SUCCESS! -- 32 Passed | 0 Failed | 0 Pending | 7660 Skipped

cc: @ConnorJC3 @AndrewSirenko

[ConnorJC3]

/lgtm

[ConnorJC3]

/lgtm

[AndrewSirenko]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AndrewSirenko

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