fix: use gn/clang-format from src (#19145)

* fix: use gn/clang-format from src

* fix: download clang-format in lint job

* chore: fix linting warning

* chore: get_path_in_buildtools => get_buildtools_executable

* chore: the clang-format npm package is not used

script/run-clang-format.py

@@ -22,6 +22,7 @@ import traceback
 import tempfile
 
 from functools import partial
+from lib.util import get_buildtools_executable
 
 DEFAULT_EXTENSIONS = 'c,h,C,H,cpp,hpp,cc,hh,c++,h++,cxx,hxx,mm'
 
@@ -188,7 +189,7 @@ def main():
         '--clang-format-executable',
         metavar='EXECUTABLE',
         help='path to the clang-format executable',
-        default='clang-format')
+        default=get_buildtools_executable('clang-format'))
     parser.add_argument(
         '--extensions',
         help='comma separated list of file extensions (default: {})'.format(