[CI] Add a build plan to run clang-tidy on the changed files

Summary:
This is planned to run on each diff as is fast and will prevent from
missing brackets.

Test Plan: Run the build plan on CI.

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Subscribers: deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D6627