[clang] [lldb] [clang]: support std::meta::info for primitive types (PR #190356)

[via cfe-commits]

Sirraide wrote:

> With what we have in this PR, it should be enough to proceed to the implementation of std::meta::is_type for primitive types. For unimplemented reflection entities in parsing, you will still get a diagnostics instead of a bool return from the function. Also, after this PR we should also be able to implement simple splice expressions

Sg; once this lands we can start working on some of these things in parallel.

https://github.com/llvm/llvm-project/pull/190356