Added Multiple tests to increase FPU Coverage

Created by: Dygore

1. Added coverage for the FPU Flag.sv: fmaAs, fmaPs, YSNan, and ZSNan (Line 48-59)
2. Added coverage for the FPU Round.sv: lsbRes (Line 61-64)
3. Added Coverage for the FPU Unpackinput.sv: UnpackinputZ's BadNaNBox (Line 66-70)

Overall the tests added increased the FPU coverage from 92.88% -> 93.21%

No other tests were changed, there was only new tests and data added, so nothing else was harmed in the process of increasing coverage!