[llvm] [NFCI][Coroutines] update tests to autogenerated formatting (PR #178358)

[Nikita Popov via llvm-commits]

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nikic wrote:

I'd prefer leaving this test alone. Debuginfo is hard to understand, and the previous interleaved comments were helpful.

Debuginfo tests in general are an accepted exception from UTC use.

https://github.com/llvm/llvm-project/pull/178358