Require VACs to use SI units

[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 updates the logic to accept SI units for throughput for VolumeAttributesClasses. This makes the VACs consistent with SI being used in other areas, such as in StorageClasses.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

This feature changes VolumeAttributesClass, so throughput specifications will need "Mi".

[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

[amacaskill]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[amacaskill]

/cherry-pick release-1.15

[k8s-infra-cherrypick-robot]

@amacaskill: #1875 failed to apply on top of branch "release-1.15":

Applying: Require VACs to use SI units
Using index info to reconstruct a base tree...
A	examples/kubernetes/demo-vol-create.yaml
M	test/e2e/tests/single_zone_e2e_test.go
Falling back to patching base and 3-way merge...
Auto-merging test/e2e/tests/single_zone_e2e_test.go
CONFLICT (content): Merge conflict in test/e2e/tests/single_zone_e2e_test.go
CONFLICT (modify/delete): examples/kubernetes/demo-vol-create.yaml deleted in HEAD and modified in Require VACs to use SI units. Version Require VACs to use SI units of examples/kubernetes/demo-vol-create.yaml left in tree.
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
hint: When you have resolved this problem, run "git am --continue".
hint: If you prefer to skip this patch, run "git am --skip" instead.
hint: To restore the original branch and stop patching, run "git am --abort".
hint: Disable this message with "git config advice.mergeConflict false"
Patch failed at 0001 Require VACs to use SI units

In response to this:

/cherry-pick release-1.15

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.