Leave zero argument bool alone in the CuTeDSL preprocessor

[Hashim1999164]

Staged bool() has no args so the preprocessor indexed args[0] and raised IndexError.

Only redirect bool when there is exactly one positional argument. Zero argument and keyword forms stay as bool so Python can raise TypeError.

Closes #3506

Test plan

Run test/python/CuTeDSL/test_bool_zero_args.py with the CuTeDSL package available.

[Hashim1999164]

yo looks like this already landed on main (and #3506 is closed for 4.8). the preprocessor now only rewrites the one arg bool form and leaves bool() alone. gonna close this one out since theres nothing left to ship here.