[clang-tools-extra] [clang-tidy] : add fix-it for if/else case (PR #196783)

[via cfe-commits]

github-actions[bot] wrote:

⚠️ We detected that you are using a GitHub private e-mail address to contribute to the repo.<br/> Please turn off [Keep my email addresses private](https://github.com/settings/emails) setting in your account.<br/> See [LLVM Developer Policy](https://llvm.org/docs/DeveloperPolicy.html#email-addresses) and [LLVM Discourse](https://discourse.llvm.org/t/hidden-emails-on-github-should-we-do-something-about-it) for more information.

https://github.com/llvm/llvm-project/pull/196783