Hyperdisk smaller than 4GiB can not be created

[dfajmon]

When trying to create a hyperdisk smaller than 4GiB it fails.

Warning  ProvisioningFailed    20s (x10 over 5m1s)  pd.csi.storage.gke.io_ahafe-gcp-high-bhhd5-master-2.c.ocpstrat-1278.internal_ee5a8bd3-b1d9-4e9f-837d-73d624d90e91  failed to provision volume with StorageClass "balanced-storage": rpc error: code = InvalidArgument desc = CreateVolume failed: rpc error: code = InvalidArgument desc = CreateVolume failed to create single zonal disk pvc-4b0d2cc9-a677-4d36-9b34-bc14c8650826: failed to insert zonal disk: unknown Insert disk error: googleapi: Error 400: Disk size cannot be smaller than 4 GB for disk type hyperdisk-balanced., badRequest%!v(MISSING)

Resolution:
The driver should check if the size is valid, if the size is invalid it should round up to the closest.

[sunnylovestiramisu]

This will bypass quota check in Kubernetes, which is not the experience we want?

[dfajmon]

this has been discussed in upstream meeting and was accepted that it should be implemented
https://docs.google.com/document/d/1-oiNg5V_GtS_JBAEViVBhZ3BYVFlbSz70hreyaD7c5Y/edit?tab=t.0

cc @jsafrane

[sunnylovestiramisu]

Ignore this comment, I was mixing it with another issue