FEATURE: make a drift-corrected binary file for Phy

[marius10p]

Feature you'd like to see:

Similar to Kilosort 2.5/3. This helps the visualization in Phy when there is a lot of drift, so that waveform snippets are extracted after drift correction. Like in previous versions, the filtered, whitened and drift-corrected data should be multiplied by 200 before converting to int16 for the binary file.

Some things to be careful about: the inverse whitening matrix needs to be disabled in this case (replace with identity divided by 200).

Additional Context

No response