Add -I<directory> option to tools/linter/clang_tidy.py (#60745)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/60745
Fixes #60739
Test Plan:
Run this command:
```
python3 tools/linter/clang_tidy.py --paths torch/csrc/fx -I/usr/include/path -I/usr/include/another/path --print-include-paths
```
Output:
If the paths don't exist, you should see this:
```
ignoring nonexistent directory "/usr/include/path"
ignoring nonexistent directory "/usr/include/another/path"
```
If the paths exist, you should see them listed.
Reviewed By: ngimel
Differential Revision: D29395227
Pulled By: 1ntEgr8
fbshipit-source-id: c89650546d45887cd39e574da07f08bcfec686e0
