[FEATURE REQ] `FromExisting` methods should support setting scopes

[captainsafia]

Library name

Azure.Provisioning 1.0.0

Please describe the feature.

The FromExisting methods that are exposed on resource types in the library take a resource identifier and a version.

azure-sdk-for-net/sdk/provisioning/Azure.Provisioning.CosmosDB/src/Generated/CassandraTableThroughputSetting.cs

Lines 271 to 273 in 6167175

	public static CassandraTableThroughputSetting FromExisting(string bicepIdentifier, string? resourceVersion = default) =>
	new(bicepIdentifier, resourceVersion) { IsExistingResource = true };
	}

As a result, it's not possible to reference existing resources that have been scoped to a resource group or subscription as defined in https://learn.microsoft.com/en-us/azure/azure-resource-manager/bicep/bicep-functions-scope.

Also, it doesn't appear like there are properties to set on the resulting resource types to configure the scope after the fact.

It's possible to manually workaround this issue by building out the expression manually but a helper would be nice.

Would it be possible to expand the behavior of FromExisting so that scopes can be set on the target resource?