[clang] [clang] Inject tokens containing #embed back into token stream (PR #97274)

[Aaron Ballman via cfe-commits]

AaronBallman wrote:

> > I'd like to point out that most of the testcases I wrote for the GCC implementation still fail with the latest clang on godbolt.
> 
> This patch should help with at least some of them.

It'd be good to verify that it does help with them or see if there are other issues we're not yet tracking (but please do not copy the tests from the GCC implementation into Clang because of licensing).

https://github.com/llvm/llvm-project/pull/97274