ConstructKRMExternalRefValFromTFRefVal constructs the external referenced value of the reference field with "TF Reference Value" in the format of `[referenced_tf_type].[referenced_resource_name].[referenced_field_name]` and the "Value Template".

GetTFReferenceValue extracts "TF Reference Value" in the format of `[referenced_tf_type].[referenced_resource_name].[referenced_field_name]`, "Value Template" if the input contains more than the "TF Reference Value", and a bool result of whether the input contains a TF ReferenceValue.