[clang] [llvm] [coro] Lower `llvm.coro.await.suspend.handle` to resume with tail call (PR #89751)

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zmodem wrote:

This was testing that "the lifetime of the coroutine handle used to obtain
the address is contained within single basic block, and hence does not
live across suspension points"

Since we no longer separately obtain the handle and pass it to
@llvm.coro.resume, this test doesn't really test anything.

https://github.com/llvm/llvm-project/pull/89751