[clang-tools-extra] [clang-tidy] modernize-return-braced-init-list: skip types with an initializer_list constructor (PR #205440)

[Zeyi Xu via cfe-commits]

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

Personally LGTM. Would you please resolve the conflicts so we can land this?

https://github.com/llvm/llvm-project/pull/205440