chore: fix missing securityContext on controller pods

[xrstf]

What type of PR is this?
/kind cleanup

What this PR does / why we need it:
In #1210 security contexts were added, but none was added to the snapshot controller and the CSI controller. Something similar happened in the azuredisk CSI repo, with the same oversight. In the azuredisk repo, the oversight was fixed in kubernetes-sigs/azuredisk-csi-driver#1805 and this PR is the equivalent for the azurefile CSI.

Requirements:

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

Release note:

Add securityContext to driver controller and snapshot controller Pods.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: xrstf
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[andyzhangx]

/retest

[andyzhangx]

/test pull-azurefile-csi-driver-sanity

[andyzhangx]

/test pull-azurefile-csi-driver-sanity

[andyzhangx]

/test pull-azurefile-csi-driver-e2e-capz

[andyzhangx]

/retest

[k8s-ci-robot]

@xrstf: 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-sanity	ca86db2	link	true	/test pull-azurefile-csi-driver-sanity
pull-azurefile-csi-driver-e2e-capz-windows-2019-hostprocess	ca86db2	link	true	/test pull-azurefile-csi-driver-e2e-capz-windows-2019-hostprocess
pull-azurefile-csi-driver-e2e-capz-windows-2019	ca86db2	link	true	/test pull-azurefile-csi-driver-e2e-capz-windows-2019
pull-azurefile-csi-driver-e2e-migration	ca86db2	link	true	/test pull-azurefile-csi-driver-e2e-migration
pull-azurefile-csi-driver-e2e-migration-windows	ca86db2	link	true	/test pull-azurefile-csi-driver-e2e-migration-windows
pull-azurefile-csi-driver-e2e-capz-windows-2022-hostprocess	ca86db2	link	true	/test pull-azurefile-csi-driver-e2e-capz-windows-2022-hostprocess

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.

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[xrstf]

Did I accidentally actually break something?

[andyzhangx]

Did I accidentally actually break something?

@xrstf No, we are in the middle of migrating all GCP based tests to AWS, that would require efforts.