[clang] [clang-tools-extra] [clang-include-cleaner] Make cleanup attr report expr location (PR #140233)

[kadir çetinkaya via cfe-commits]

kadircet wrote:

changes in include-cleaner LG, but I am not sure about the canonical way of tracking this location in clang (i.e. if we're going to track an expression within the attribute, do we still need to tract the underlying decl as well? can't we just extract it from expr when needed?) so cc @AaronBallman, can you redirect to relevant folks if it isn't obvious?

https://github.com/llvm/llvm-project/pull/140233