replace numpy.bool with bool 3/N
Summary:
numpy.bool is long deprecated and removed starting numpy-1.20.0 [1]. This replaces all references with equivalent `bool` type using the following oneliner:
```
rg '\bnp\.bool\b' -lg '.py' fbcode | xargs perl -pi -e 's,\bnp\.bool\b,bool,'
```
Selected some changes and applied arc lint.
1. https://numpy.org/devdocs/release/1.20.0-notes.html#deprecations
Reviewed By: florazzz
Differential Revision: D50476847
fbshipit-source-id: 2d96df95b5af5f09aae0b33583f4613105cd10d6
