feat: add a file watcher for Azure client cert auth

[bryan-cox]

What type of PR is this? /kind bug

What this PR does / why we need it: Add a file watcher, utilizing fsnotify, to monitor the Azure client certificate authentication. If the file changes, the pod will need to be restarted since Azure SDK doesn't support hotloading a new certificate yet.

Which issue(s) this PR fixes:

Fixes #

Requirements:

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

Special notes for your reviewer:

Release note:

none

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: bryan-cox Once this PR has been reviewed and has the lgtm label, please assign feiskyer for approval. For more information see the Kubernetes Code Review Process.

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Needs approval from an approver in each of these files: - **[OWNERS](https://github.com/kubernetes-sigs/azurefile-csi-driver/blob/master/OWNERS)** Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @bryan-cox. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[andyzhangx]

/ok-to-test

[bryan-cox]

/test pull-azurefile-csi-driver-verify

[bryan-cox]

/retest

[bryan-cox]

/retest-required

[k8s-ci-robot]

@bryan-cox: 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-2019	68c731648745e5fdcec7bb4a2c1d79139188322b	link	true	/test pull-azurefile-csi-driver-e2e-capz-windows-2019
pull-azurefile-csi-driver-e2e-capz-windows-2022	bc2bc3a418845af5e53ea671f10f172d4f0ac829	link	true	/test pull-azurefile-csi-driver-e2e-capz-windows-2022

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes-sigs/prow](https://github.com/kubernetes-sigs/prow/issues/new?title=Prow%20issue:) repository. I understand the commands that are listed [here](https://go.k8s.io/bot-commands).

[andyzhangx]

/cherrypick release-1.31

[k8s-infra-cherrypick-robot]

@andyzhangx: new pull request created: #2191

In response to [this](https://github.com/kubernetes-sigs/azurefile-csi-driver/pull/2182#issuecomment-2475221179): >/cherrypick release-1.31 Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes-sigs/prow](https://github.com/kubernetes-sigs/prow/issues/new?title=Prow%20issue:) repository.