Windows testing: enable architecture test (#36973)

Works out of the box: remove skip.

lib/spack/spack/test/architecture.py

@@ -4,7 +4,6 @@
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 import os
 import platform
-import sys
 
 import pytest
 
@@ -59,7 +58,6 @@ def test_platform(current_host_platform):
     assert str(detected_platform) == str(current_host_platform)
 
 
-@pytest.mark.skipif(sys.platform == "win32", reason="Not supported on Windows (yet)")
 def test_user_input_combination(config, target_str, os_str):
     """Test for all the valid user input combinations that both the target and
     the operating system match.