Add c4d to gen4 attach limit list

[hajiler]

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 bug

What this PR does / why we need it:
For GCP Gen4 machine types, there are CPU dependent volume attach limits. This PR adds missing machine family c4d to this list of machine types.
Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[tonyzhc]

/ok-to-test

[k8s-ci-robot]

@hajiler: 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-e2e-windows-2022	ff18b2a	link	false	/test pull-gcp-compute-persistent-disk-csi-driver-e2e-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.

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[amacaskill]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[tonyzhc]

/cherry-pick release-1.19

[k8s-infra-cherrypick-robot]

@tonyzhc: #2120 failed to apply on top of branch "release-1.19":

Applying: Add c4d to gen4 attach limit list
Using index info to reconstruct a base tree...
M	pkg/gce-pd-csi-driver/node_test.go
Falling back to patching base and 3-way merge...
Auto-merging pkg/gce-pd-csi-driver/node_test.go
CONFLICT (content): Merge conflict in pkg/gce-pd-csi-driver/node_test.go
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 Add c4d to gen4 attach limit list

In response to this:

/cherry-pick release-1.19

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