VLSingle CRD missing at sync time — ArgoCD pre-validates all resources
before applying any, causing 'synchronization tasks not valid' on CRs
whose CRDs are created by the operator in the same sync wave.
SkipDryRunOnMissingResource=true bypasses dry-run for missing CRDs,
unblocking the CRD bootstrap deadlock.
Fix CRD bootstrap deadlock on victoria-metrics-k8s-stack ArgoCD app.
Adds prune: true and RespectIgnoreDifferences=true to prevent sync
failures when CRs are applied before CRDs are established.
