Clarify conformance related to patient-based CV measures

Agree with recommendation for alignment with current HQMF conformance: Adjust Conformance Requirement 3.13 (Continuous Variable Measures) to align with the CQL-Based HQMF requirement to allow patient-based CV measures where the Measure Observation function does not have a parameter. For non-patient-based measures, this means the function must take a single argument of the element type of the list type of the criteria; for patient-based measures, this means the function is parameterless (i.e. takes no arguments). In addition, ensure the conformance requirement clarification applies to ratio measures as well.