Fix shortfin test failures on Windows

[ScottTodd]

A few test cases are failing and were tagged to be skipped on Windows in #289 and #293.

• In shortfin/tests/api/array_storage_test.py, test_fill_error (parameterized and unparameterized) crashed with Windows fatal exception: access violation
• In shortfin/tests/host_cpu_system_test.py, test_create_host_cpu_system_topology_nodes_all crashed with Windows fatal exception: access violation
• In shortfin/tests/host_cpu_system_test.py, test_create_host_cpu_system_env_vars failed with

  FAILED tests/host_cpu_system_test.py::test_create_host_cpu_system_env_vars - AssertionError: assert 1 == 2
   +  where 1 = len([Device(name='hostcpu:0:0@0', ordinal=0:0, node_affinity=0, capabilities=0x1)])
   +    where [Device(name='hostcpu:0:0@0', ordinal=0:0, node_affinity=0, capabilities=0x1)] = <_shortfin_default.lib.local.System object at 0x0000020CF2DD6770>.devices
  

The crashes aren't producing useful logs on CI or locally. Sample: https://github.com/nod-ai/SHARK-Platform/actions/runs/11376394068/job/31648798745#step:9:241 . Not sure what the current state of Python with native code debugging is. We might be missing something as part of the nanobind setup? I would expect a callstack from the thread with C++ symbols in it.