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

[Jameson Nash via llvm-commits]

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vtjnash wrote:

Yeah, I think that looks better also. I've rebased https://github.com/llvm/llvm-project/pull/178359, and the test changes there look in good shape to me also with the replacement of struct gep (and removal of getAllocatedType) with ptrgep

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