tools: bump cpplint.py to 1.4.6

Refs: https://github.com/cpplint/cpplint/releases/tag/1.4.6

PR-URL: #35569
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>

Author: Trott