[CI] update MLD regex to deal with scientific notation
MLD regex could not deal with scientific notation results, such as "1.3096724e-10" which can occur for very small differences. This update fixes it.
For other measures, the current state should be fine
- Max abs diff is always in [-2**16, 2**16] (+/-1, nevermind) which is always given as normal integer
- SSNR can be nan (depending on the thresholding of parts) or inf (for identical signals). It is expressed in dB, so even very small numbers should not get into the range of scientific notation
- ODG is in [-5, 0.2-ish]