[clang] [lldb] [lldb] Support arm64e C++ vtable pointer signing (PR #187611)

[Jonas Devlieghere via cfe-commits]

JDevlieghere wrote:

Thanks for the feedback everyone. I implemented @Michael137's suggestion of checking the prefix which should alleviate any concerns about this impacting anything but LLDB.

https://github.com/llvm/llvm-project/pull/187611