2.0/Fix integration test - Division of different units is not supported

[cheng13231]

Describe the bug

To Reproduce Steps to reproduce the behavior:

1. Run following integration test UseofHighRiskMedicationsintheElderlyFHIR -> test case 3201fe4a-d1b0-4296-a60e-8680247e8128
2. See error

Version used:

• Version: develop-2.0 (commit https://github.com/FirelyTeam/firely-cql-sdk/commit/25584e496722c12894d706b6757fd4cd0f52c074)