Build native Windows packages for both RDNA4 targets

Add explicit gfx1200/gfx1201 builds, runtime selection and per-target
code objects. Guard staging, packaging and installation against mixed
architectures; retain gfx1201 compatibility and strict K/M arithmetic.

Adapt realdody's target configuration and MSVC binary16/BOOL portability
fixes from ae530b0. Do not import its forced gfx12 layout on RDNA3.
Add exhaustive binary16 and C++/PowerShell target contract regressions.

Validation: 20 CTest gates on RX 9070 XT; four software-only gfx1200 gates;
MSVC portability compile checks; exact 4K K async and M control outputs;
isolated package install/restore and mixed-target rejection tests.
No physical gfx1200 validation is claimed.

Co-authored-by: realdody <[email protected]>

tools/windows/k_replay_validate.py

@@ -139,7 +139,7 @@ def validate(layer, directory, output, window_count=1, real_capture=False):
     if maximum > absolute_limit or psnr < 60:
         worst = int(difference.argmax())
         raise RuntimeError(f'K mismatch at {worst}: reference={expected[worst]}, gpu={actual[worst]}')
-    print(f'PASS K_REPLAY_REFERENCE kernel={layer} architecture=gfx1201 nan_inf=0')
+    print(f'PASS K_REPLAY_REFERENCE kernel={layer} reference_layout=gfx12 nan_inf=0')
 
 
 if __name__ == '__main__':