Change shebangs from python3 to python

[jack60612]

Purpose:

Allows these files to run on windows

Current Behavior:

Pre-commit broken on windows

New Behavior:

Pre-commit working on windows

Testing Notes:

Change python3 to python in shebang in all files

[jack60612]

need to test on my macbook.

[jack60612]

still works on my macbook

[altendky]

this might be a reasonable solution. i'm trying to understand the situation a bit more still.

[altendky]

to document, the hassle here is that we have direct shebang usage on linux/macos and handling the variety there. we then have windows configurations allowing for associating .py files as executables and processing them via the py launcher (ftype, assoc, and PATHEXT are adjacent things) which does it's own processing of the shebang. it handles python3 fine because it doesn't treat it as a file name but rather as a python version specifier. it then goes and finds a python version that satisfies the requested version and is fine. but, pre-commit also does shebang handling and does not do python version aware parsing of the shebang, of course, and so it fails on python3 since the executables are python.exe. some devs have addressed this with a python3 -> python alias in powershell. useful to mention, but not exactly a general solution. pre-commit does have some PATHEXT awareness, though it's not entirely clear it works and it specifically does would not apply to ./ commands. and removing ./ doesn't work on not-windows anyways.