pkg/common/utils.go: update regionalLocationFmt for Europe with 10+ regions

[JordanP]

GCP now offers more than 10 regions in Europe. Update the regex accordingly.

What type of PR is this?
/kind bug

What this PR does / why we need it:
This driver does not work in europe-west10, 11 and 12. Tested in europe-west-12 (Turin, Italy) and got:

Failed to create snapshot: failed to take snapshot of the volume projects/own-lab-462214/zones/europe-west12-a/disks/pvc-da12fb90-1832-4e6c-9187-24f4ab3f64d9: "rpc error: code = InvalidArgument desc = Invalid snapshot parameters: invalid location for snapshot: \"europe-west12\""

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:
I need this please 🙏 This looks broken.

Does this PR introduce a user-facing change?:

NONE

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[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: JordanP
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[JordanP]

If confirmed that we can't use volume snapshot in europe-west10,11 and 12, I'd to see this backported please.