[clang-tools-extra] [clang-tidy] Add bugprone-smart-ptr-initialization check (PR #181570)

[via cfe-commits]

https://github.com/zeyi2 approved this pull request.

Thanks for working on this!

Overall LGTM (besides some nit), but please wait for other reviewers :)

https://github.com/llvm/llvm-project/pull/181570