[clang] [clang-format] Handle common C++ non-keyword types as such (PR #83709)

[Owen Pan via cfe-commits]

owenca wrote:

> Just thinking out loud and maybe not for this patch but for a more general solution, what we seem to never do is collect information about types local to the file as we go; For example what if a first pass identified types from declarations and function argument declarations, return types, template arguments and added them to a structure that would have some probability that a given identifier was actually a type.

I'm kind of skeptical because we can't even correctly annotate the declarators all the time, but someone must actually try it to find out.

https://github.com/llvm/llvm-project/pull/83709