Add UtAssert_MIR macro (similar to UtAssert_NA)

**Is your feature request related to a problem? Please describe.**
Use of UTASSERT_CASETYPE_MIR not standardized like NA, leads to potential for misuse

**Describe the solution you'd like**
Add a similar macro as UtAssert_NA

**Describe alternatives you've considered**
None

**Additional context**
Related to nasa/cFE#1711

**Requester Info**
Jacob Hageman - NASA/GSFC