Update description for parameter -InputObject, to indicate it can accept resourceId

InputObject is generated in all cmdlets, and it can accept a string input of a ResourceId, or an object which has an Id field.

A sample syntax:
```
Get-AzStorageMover -InputObject [-DefaultProfile ] [-Break] [-HttpPipelineAppend ] [-HttpPipelinePrepend ] [-Proxy ] [-ProxyCredential ] [-ProxyUseDefaultCredentials] []
```

However, currently it's hard for users to notice that the InputObject can be a string of Id. A description should be added to explain the valid input formats when generating this parameter InputObject.