Merge branch 'kn/ci-clang-format'

A CI job that use clang-format to check coding style issues in new
code has been added.

* kn/ci-clang-format:
  ci/style-check: add `RemoveBracesLLVM` in CI job
  check-whitespace: detect if no base_commit is provided
  ci: run style check on GitHub and GitLab
  clang-format: formalize some of the spacing rules
  clang-format: avoid spacing around bitfield colon
  clang-format: indent preprocessor directives after hash

diff --cc .clang-format
Simple merge