[clang] [Clang] Back out the source location workaround for CXXConstructExpr (PR #145260)

[Erich Keane via cfe-commits]

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

I think this looks reasonable, 1 nit on the name of the member variable, else this LGTM.

https://github.com/llvm/llvm-project/pull/145260