Add Paired Single Move Tests

[Geotale]

Adds a new file for common float tests -- This will likely be used more in the future as well Modifies two other test files which now use functions in the CommonFloat file The location of frsqrte_expected might change because it's not exactly common? ^^; Adds software implementation of mantissa truncation and rounding given the expected rounding mode Both of these are for tests for float move instructions These instructions include: ps_merge, ps_mr, ps_neg, ps_abs, ps_nabs ps_rsqrte is included to check for a similar quirk (it returns an f64) Marked as a draft until I or someone else can test on hardware (so like. a few hours if I can get it working)