Add ControllerModifyVolume functionality

[travisyx]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change
/kind bug
/kind cleanup
/kind design
/kind documentation
/kind failing-test

/kind feature

/kind flake

What this PR does / why we need it

This PR implements ControllerModifyVolume. The code changes made allow for hyperdisks which support dynamic provisioning to update the IOPS and Throughput by patching the PVC with a different VolumeAttributesClass. For more information, see here.

Which issue(s) this PR fixes:

Fixes #1693

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

The ControllerModifyVolume functionality has been added to the CSI driver, allowing for dynamic provisioning of metadata for hyperdisks for an alpha cluster with the VolumeAttributesClass enabled.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: travisyx / name: Travis Xiang (002eb8c, 230545f)
• ✅ login: maxkimambo / name: Max Kimambo (c72a290)

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @travisyx. 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.

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[amacaskill]

/ok-to-test

[travisyx]

/retest

[travisyx]

/retest

[travisyx]

/retest

[travisyx]

/retest

[travisyx]

/retest

[amacaskill]

/test pull-gcp-compute-persistent-disk-csi-driver-kubernetes-integration

[k8s-ci-robot]

@travisyx: The following test 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-gcp-compute-persistent-disk-csi-driver-verify	002eb8c	link	true	/test pull-gcp-compute-persistent-disk-csi-driver-verify

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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[mattcary]

/lgtm
/approve

According to @amacaskill this is all good except for the known & unrelated arm64 build problem, so I'll force-merge.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mattcary, travisyx

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