hotfix: fix storageClassName CEL validation

[patrykw-splunk]

Description

It fixes storageClassName validation (#1856).

Key Changes

It updates CEL validation in api/v4/common_types.go.

Testing and Verification

Automated and manual tests

Related Issues

None

PR Checklist

• Code changes adhere to the project's coding standards.
• Relevant unit and integration tests are included.
• Documentation has been updated accordingly.
• All tests pass locally.
• The PR description follows the project's guidelines.

[github-actions]

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[gabrielm-splunk]

Can you please amend the author before it gets pushed to develop please. Don't want to run into similar issues we had as we did during 3.1.0 release