Generate CRUD commands for complicated properties as sub command group

[evelyn-ys]

Why do you need this feature?

For complicated property which is not required, CLI will prefer a new sub command group for it's CRUD. But codegen won't generate in this way for now.

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

Can we generate a new sub group az storage account local-user permission-scope with command add/update/list?

Describe the solution you'd like

Can code gen auto-detect and generate add/update/remove/list/show command as sub command group for complicated property? Whether to generate all of add/update/remove/list/show or some of them is optional.