simd_op_check_sve2 is broken with trunk LLVM

[vksnk]

It seems to be broken after https://github.com/llvm/llvm-project/commit/15fbdc2b9635b75f431a26b89b48fe03e7ed9d5c. The checks which fail now are produced by these lines: https://github.com/halide/Halide/blob/7356c6df9e2bfed9637183a2bd114ce8adba1de8/test/correctness/simd_op_check_sve2.cpp#L701-L705.

I tried to fix it, but I don't really now much about SVE2, so wasn't able to do anything smarter than commenting these line so far.