Check for the existence of the correct storage class prior to registry / gitea initialization

[Racer159]

Is your feature request related to a problem? Please describe.

The registry / gitea packages require a storage class / pvc to operate and it would be nice to have them check for the existence of such a storage class before they try to run.

Describe the solution you'd like

• Given I have a cluster configured without a storage class
• When I initialize Zarf with the registry or gitea
• Then I receive an error telling me that the storage class is misconfigured (instead of a permanent pending pod)

Additional context

This would be the equivalent of the following action:

    actions:
      onDeploy:
        before:
          - description: Check that the cluster has the correct storage class
            maxRetries: 0
            cmd: |
              CLUSTER_STORAGE_CLASSES=$(./zarf tools kubectl get -A StorageClass -o jsonpath={$.items[*].metadata.name})
              if [ -n "${CLUSTER_STORAGE_CLASSES}" && -n "${CLUSTER_STORAGE_CLASSES##*${ZARF_STORAGE_CLASS}*}" ]; then echo "the Zarf init registry package requires a configured storage class to function"; fi

Though it may be worth considering a more expressive "assert" syntax that wraps these kinds of checks like wait does.

[robmcelvenny]

I would like to work on this issue.

[lucasrod16]

Reopening this issue. See #2311 for more context