[Loc] Presubmit performance improvement

The current Loc presubmit are doing two checks: check_localizable_resources and check_localizability
(Details of what they are checking: https://docs.google.com/document/d/1L6TkT2-42MMQ72ZSBMFwUaq7M6mDgA2X0x8oHHKaV_U/edit#heading=h.w1no7qaa0mi0)

This CL merge two checks into one single check. check_localizability are modified into a utils file, and check_localizable_resources will also run those localizability checks when the files are visited. By doing this, we avoid the extra call to node during presubmit, and all files and nodes will only be visited once.

Also adding these fixes
https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2370103
Fix:
- Pass the fullpath for comparison.(itemPath)
- Normalize comparison between paths
- using native fs.promises instead of promisify (nodejs/node#26581)

Bug: 1116989
Change-Id: I054040d83a65b5f798a21c040096422e287bc799
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2381320
Reviewed-by: Vidal Diazleal <[email protected]>
Reviewed-by: Tim van der Lippe <[email protected]>
Reviewed-by: Simon Zünd <[email protected]>
Commit-Queue: Christy Chen <[email protected]>

scripts/devtools_paths.py

@@ -66,10 +66,6 @@ def check_localizable_resources_path():
     return path.join(devtools_root_path(), 'scripts', 'localization', 'check_localizable_resources.js')
 
 
-def check_localized_strings_path():
-    return path.join(devtools_root_path(), 'scripts', 'localization', 'check_localizability.js')
-
-
 def karma_path():
     return path.join(node_modules_path(), 'karma', 'bin', 'karma')