[WIP] feat: support privateDNSZoneName parameter in storage class

[andyzhangx]

What type of PR is this?
/kind feature

What this PR does / why we need it:
feat: support privateDNSZoneName parameter in storage class

Which issue(s) this PR fixes:

Fixes #2845

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Special notes for your reviewer:

Release note:

feat: support privateDNSZoneName parameter in storage class

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[Copilot]

Pull Request Overview

This PR adds support for the privateDNSZoneName parameter in storage class configurations for the Azure File CSI driver. This parameter allows users to specify a custom private DNS zone name when creating storage accounts with private endpoints.

Key Changes

• Added privateDNSZoneName parameter support in storage class with validation that it can only be used with private endpoints
• Default value of "privatelink" is set when private endpoints are enabled but no custom name is provided
• Added unit test for validation logic and updated e2e tests to include the new parameter

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
pkg/azurefile/azurefile.go	Added constant definition for privateDNSZoneNameField
pkg/azurefile/controllerserver.go	Implemented parameter parsing, validation logic, and default value assignment
pkg/azurefile/controllerserver_test.go	Added unit test for validation when privateDNSZoneName is used without private endpoint
test/e2e/dynamic_provisioning_test.go	Added privateDNSZoneName parameter to e2e test cases
pkg/azurefile/azure_test.go	Added duplicate test case and formatting changes

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[k8s-ci-robot]

@andyzhangx: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-azurefile-csi-driver-e2e-capz-windows-2022-hostprocess	535b6c2	link	true	/test pull-azurefile-csi-driver-e2e-capz-windows-2022-hostprocess
pull-azurefile-csi-driver-e2e-capz-windows-2019-hostprocess	535b6c2	link	true	/test pull-azurefile-csi-driver-e2e-capz-windows-2019-hostprocess
pull-azurefile-csi-driver-e2e-capz	535b6c2	link	true	/test pull-azurefile-csi-driver-e2e-capz

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[kmj251]

I'm not sure that this addresses the GitHub Issue. As was noted in the issue, it would be helpful to provide values to a variable or combination of variables that allow us to dictate where a pre-existing private DNS zone (i.e. privatelink.file.core.windows.net) is already created. An easy solution would be to provide a variable like privateDNSZoneResourceID. We would pass in a value like: /subscriptions/<subscription_id>/resourceGroups/<resource_group_name>/providers/Microsoft.Network/privateDnsZones/privatelink.file.core.windows.net for that pre-created/centralized Private DNS Zone. When that variable is specified, the driver should not automatically create the private DNS zone and tie the private endpoint to the pre-existing private DNS zone.