build: fix clang format location helper (again) (#42924)

Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: clavin <clavin@electronjs.org>

script/lib/util.py

@@ -194,6 +194,9 @@ def get_buildtools_executable(name):
     chromium_platform = 'linux64'
   else:
     raise Exception(f"Unsupported platform: {sys.platform}")
+  
+  if name == 'clang-format':
+    chromium_platform += '-format'
 
   path = os.path.join(buildtools, chromium_platform, name)
   if sys.platform == 'win32':