Port tests to use the intrinsic macro

[vayunbiyani]

tests/ui/simd has a bunch of test cases that need porting, I would suggest those be ported in a separate PR before we do the final big PR that removes support for this ABI from the compiler entirely.

Originally posted by @RalfJung in #132735

[vayunbiyani]

@rustbot claim

[RalfJung]

I am confused by this issue.

• What is the intrinsic "macro"?
• We already have Remove support for extern "rust-intrinsic" blocks #132735. Why did you open a new issue that seems like it tracks the exact same thing?

[vayunbiyani]

@RalfJung I thought breaking down the larger issue into smaller subtasks might be helpful. What would be the best practice here?

[RalfJung]

#132735 is already breaking things down in subtasks. We don't really need a separate issue for each subtasks when the tasks are as simple as they are here.

I'll close this in favor of #132735 then. :)