BUG: Dispatcher does not detect instruction set on WoA

Describe the issue:

Was investigating #29442 and found that the architecture detection logic for WoA is non-functional.

Reproduce the code example:

none needed - use show_runtime

Python and NumPy Versions:

2.3.2
3.12.10 (tags/v3.12.10:0cc8128, Apr  8 2025, 12:31:18) [MSC v.1943 64 bit (ARM64)]

and

2.3.2
3.12.3 (main, Jun 18 2025, 17:59:45) [GCC 13.3.0]

Runtime Environment:

[{'numpy_version': '2.3.2',
  'python': '3.12.10 (tags/v3.12.10:0cc8128, Apr  8 2025, 12:31:18) [MSC '
            'v.1943 64 bit (ARM64)]',
  'uname': uname_result(system='Windows', node='BOOK-NV3Q5DD1QM', release='11', version='10.0.26100', machine='ARM64')},
 {'simd_extensions': {'baseline': ['NEON', 'NEON_FP16', 'NEON_VFPV4', 'ASIMD'],
                      'found': [],
                      'not_found': ['ASIMDHP', 'ASIMDFHM']}}]

and

[{'numpy_version': '2.3.2',
  'python': '3.12.3 (main, Jun 18 2025, 17:59:45) [GCC 13.3.0]',
  'uname': uname_result(system='Linux', node='BOOK-NV3Q5DD1QM', release='6.6.87.1-microsoft-standard-WSL2', version='#1 SMP PREEMPT_DYNAMIC Mon Apr 21 17:10:52 UTC 2025', machine='aarch64')},
 {'simd_extensions': {'baseline': ['NEON', 'NEON_FP16', 'NEON_VFPV4', 'ASIMD'],
                      'found': ['ASIMDHP', 'ASIMDFHM'],
                      'not_found': ['SVE']}},
 {'architecture': 'armv8',
  'filepath': '/home/andrew/tmp/venv/lib/python3.12/site-packages/numpy.libs/libscipy_openblas64_-71e1b124.so',
  'internal_api': 'openblas',
  'num_threads': 12,
  'prefix': 'libscipy_openblas',
  'threading_layer': 'pthreads',
  'user_api': 'blas',
  'version': '0.3.30'}]

Context for the issue:

These are the same machine. There have been issues w/ reproduction of some crashes, and dispatch not working properly does not help.

Start by running show_runtime on the reported Windows ARM64 and Linux WSL environments and compare the instruction-set and architecture output. Trace the architecture detection path responsible for the discrepancy; done means WoA reports its instruction set consistently instead of omitting the architecture information.