[llvm] [Offload] Use new error code handling mechanism (PR #139275)

[Ross Brunton via llvm-commits]

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+//===- Auto-generated file, part of the LLVM/Offload project --------------===//
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RossBrunton wrote:

This file is from a change that this PR depends on, #138258 .

But basically the reasoning is that a lot of liboffload consists of generated code that is committed into the repo. Since it uses the error codes, it makes sense for them to also be committed otherwise they could get out of sync if only one half gets regen-ed.

https://github.com/llvm/llvm-project/pull/139275