[clang] [clang-format] Add "three dot" diff option to git-clang-format (PR #74230)

[via cfe-commits]

https://github.com/cor3ntin approved this pull request.

LGTM. 
Please give some time for clang-format folks to review the change as it is not my area of expertise.

https://github.com/llvm/llvm-project/pull/74230