`az resource list` - feature: exclude hidden resources from portal

**Related command**

`az resource list`

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

It's a problem in that this would be ok to ignore but since most of these hidden resources have spaces in the scopes, the scripts runs into issues. See https://github.com/Azure/azure-cli/issues/12885

**Describe the solution you'd like**

Since hidden resources are not shown by default in the portal, they should not be listed by default with the az command.

**Describe alternatives you've considered**

Tried using resource scopes with spaces in names.
`role_assignments=$(az role assignment list --scope \"$resource\" --query '[].principalName' -o tsv)`
would get error: `The request did not have a subscription or a valid tenant level resource provider.`

**Additional context**

Not sure if this is a Microsoft issue as I don't see any sort of flag or tag in the portal for the hidden resources that can be used with az cli.