[clang-tools-extra] Follow style configuration in clangd when inserting missing includes (PR #140594)

[Nathan Ridge via cfe-commits]

HighCommander4 wrote:

> @kleinesfilmroellchen @HighCommander4 would it be possible to take a look when you have some time? Many thanks!

Yep, will do. Added myself as reviewer.

https://github.com/llvm/llvm-project/pull/140594