update yapf version and style settings

[jeffra]

• We have been using yapf from a mirror copy for years (https://github.com/pre-commit/mirrors-yapf) which is no longer maintained, the official version is now on github (https://github.com/google/yapf)
• @stas00 and I had a discussion that our existing formatting settings are not great, this PR bumps up the character limit per line fro 89 -> 119 and also sets SPLIT_ALL_COMMA_SEPARATED_VALUES = false which in many cases made code unreadable.

[stas00]

Looks amazingly better - 2.5x less lines for wrapped lines! +5,259 −12,322

This should dramatically improve PR reviewing.

e.g. before:

after: