[mlir][spirv] Add patterns to convert `spirv.IAddCarry` to `spirv.IAdd`

[kuhar]

This is for WebGPU where extended arithmetic is not supported yet.

Related past issue for extended multiplication: #59563

[llvmbot]

@llvm/issue-subscribers-mlir-spirv

[inbelic]

Had the chance to take a look this evening. Was able to follow from the previous implementation to create a pull request for a fix :)