[PATCH 84/85] Add support for ISubBorrow SPIRV instruction (#2168)

[PATCH 84/85] Add support for ISubBorrow SPIRV instruction (#2168)

This commit implements bidirectional translation of the llvm.usub.with.overflow and the ISubBorrow intrinsic.
Intrinsic llvm.usub.with.overflow returns struct which second element have a type of i1.
The llvm type i1 is, in llvm-spirv, directly translated to BoolType.
SPIRV specification requires that the composite which returns from ISubBorrow needs to have both elements of the same type.
In result, current implementation is not compliant and should be considered temporary.

Gbp-Pq: Name 0084-Add-support-for-ISubBorrow-SPIRV-instruction-2168.patch