[CI] Don't require SPIR-V Tools in Windows nightly (#17961)
Some people use the nightly and we don't want to require users to have
it installed.
Manually verified the fix both by reproducing the original error and
DependencyWalker.
Closes: https://github.com/intel/llvm/issues/17950
Signed-off-by: Sarnie, Nick <nick.sarnie@intel.com>
