ci/windows: Remove line numbers from assertions in spirv2dxil tests
Having to update this expected fails list just because unrelated code was touched in the file is stupid. I started the day trying to fix these, but wound up convincing myself that the SPIR-V is wrong (see https://github.com/dneto0/spirv-samples/issues/2 and https://github.com/KhronosGroup/SPIRV-Registry/issues/134). So, let's just run a regex and strip the file/line numbers.
/cc @egalli