[BugBash][CLI]missing command for SKU api and usage API

### Is your feature request related to a problem? Please describe.
missing Cli command for SKU api: https://github.com/Azure/azure-rest-api-specs/blob/main/specification/webpubsub/resource-manager/Microsoft.SignalRService/stable/2021-10-01/webpubsub.json#L1237

Usage API:
https://github.com/Azure/azure-rest-api-specs/blob/main/specification/webpubsub/resource-manager/Microsoft.SignalRService/stable/2021-10-01/webpubsub.json#L107

Cmdlet of it is included in PS module, better to have to keep consistency

### Describe the solution you'd like
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### Additional context
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