fix: prevent nil pointer dereference in GetTemplateFromRef with podMetadata. Fixes #14968#14970

Joibel merged 1 commit intoargoproj:mainargoproj/argo-workflows:mainfrom

bjoern-weidlich-anchorage:fix/cronworkflow-nil-pointer-14968bjoern-weidlich-anchorage/argo-workflows:fix/cronworkflow-nil-pointer-14968Copy head branch name to clipboard