cloud.Configuration support for endpoints (AzureChinaCloud, AzureGovernmentCloud, AzurePrivateCloud)

instead of using adapter.SetBaseUrl("https://microsoftgraph.chinaclouapi.cn/v1.0") (related to #26) maybe adapt the way how the azure-sdk-for-go is using cloud.Configuration for configuring endpoints.

json representation of cloud.Configuration content for AzurePublicCloud:

{
    "activeDirectoryAuthorityHost": "https://login.microsoftonline.com/",
    "services": {
        "resourceManager": {
            "audience": "https://management.core.windows.net/",
            "endpoint": "https://management.azure.com"
        },
        // this could be the service configuration for msgraph-sdk-go
        "microsoftGraph": {
            "audience": "https://graph.microsoft.com",
            "endpoint": "https://graph.microsoft.com"
        }
    }
}

which is initialised here: https://github.com/Azure/azure-sdk-for-go/blob/main/sdk/azcore/arm/arm.go

Inside the client creation (eg armresoruces, armauthorization, ...) the azure-sdk-for-go is using the AzurePublic endpoints by default and overwrites the endpoint if a cloud configuration is passed in the client options:

func NewClient(subscriptionID string, credential azcore.TokenCredential, options *arm.ClientOptions) (*Client, error) {
	if options == nil {
		options = &arm.ClientOptions{}
	}
	ep := cloud.AzurePublic.Services[cloud.ResourceManager].Endpoint
	if c, ok := options.Cloud.Services[cloud.ResourceManager]; ok {
		ep = c.Endpoint
	}

	// ....
}

see https://github.com/Azure/azure-sdk-for-go/blob/main/sdk/resourcemanager/resources/armresources/zz_generated_client.go#L38

Start by tracing the SDK's endpoint setup around adapter.SetBaseUrl and compare it with cloud.Configuration initialization in arm.go and the client-option handling in zz_generated_client.go. Done means the Go SDK can use AzureChinaCloud, AzureGovernmentCloud, and AzurePrivateCloud endpoints instead of assuming AzurePublicCloud defaults.