If storageClass is unspecified, don't print the field

K8s will use the default storageClass if left unspecified. However, using this chart requires the user to specify `storageClass` even if they just want to use the default.

I think this could be solved by guarding the storageClass import with `if or .Values.storageClass .Values.global.storageClass`

Locate the chart template containing the storageClass import and inspect how storageClass and global.storageClass are read. Render the chart with both values unset and with each value set, then confirm the storageClass field is omitted when neither is provided and retained when one is provided.

Scritto dal modello di indicizzazione a partire dal testo della issue.