fix: Objects with .status: {} should return Healthy

[illrill]

This fixes the health status for ProviderConfig objects, that kept being reported as Progressing in ArgoCD.

The reason is that the script was only checking for nil values in the status and conditions fields. In Lua, an empty table is not the same as nil. In the ProviderConfig object, the status field is an empty object status: {}.

apiVersion: azure.upbound.io/v1beta1
  kind: ProviderConfig
  metadata:
    annotations:
      argocd.argoproj.io/sync-options: SkipDryRunOnMissingResource=true
      argocd.argoproj.io/tracking-id: [REDACTED]:azure.upbound.io/ProviderConfig:crossplane-system/azure-workload-identity
    creationTimestamp: "2024-04-09T13:33:11Z"
    finalizers:
    - in-use.crossplane.io
    generation: 1
    name: azure-workload-identity
    resourceVersion: "19576"
    uid: f2414d9f-df3a-4378-b760-0a4301da82ff
  spec:
    clientID: [REDACTED]
    credentials:
      source: OIDCTokenFile
    oidcTokenFilePath: /var/run/secrets/azure/tokens/azure-identity-token
    subscriptionID: [REDACTED]
    tenantID: [REDACTED]
  status: {}

This fix extends the conditions to also catch when the field field exists but is empty, by using the next function to return nil if the table is empty. The ProviderConfig is now showing healthy!

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[plumbis]

Thanks for the fix!