Fix Windows runner issues

- Use cmd shell instead of pwsh (not available)
- Remove Linux CUDA container tests on Windows
- Add simple Windows-native GPU/CPU tests
- Fix Windows batch syntax

Signed-off-by: cdunning <cdunning@nvidia.com>

Author: camille-004

.github/workflows/ci.yml

@@ -71,16 +71,16 @@ jobs:
     - name: Check Hardware (Windows)
       if: matrix.os == 'windows'
       timeout-minutes: 5
-      shell: pwsh
+      shell: cmd
       run: |
-        Write-Host "=== Host Hardware Information ==="
-        Write-Host "Runner: ${{ matrix.runner }}"
-        if ("${{ matrix.gpu }}" -eq "true") {
+        echo === Host Hardware Information ===
+        echo Runner: ${{ matrix.runner }}
+        if "${{ matrix.gpu }}"=="true" (
           nvidia-smi
-        } else {
-          Write-Host "CPU-only runner (no GPU access)"
-          Get-ComputerInfo | Select-Object CsProcessors, TotalPhysicalMemory
-        }
+        ) else (
+          echo CPU-only runner (no GPU access)
+          systeminfo | findstr /C:"Processor"
+        )
         
         
     - name: Test CUDA Image with GPU (Linux)
@@ -110,29 +110,21 @@ jobs:
           nvidia-smi 2>/dev/null || echo 'nvidia-smi not available without --gpus flag (expected)'
         "
 
-    - name: Test CUDA Image with GPU (Windows)
+    - name: Test Windows Container with GPU
       if: matrix.gpu == true && matrix.os == 'windows'
       timeout-minutes: 10
-      shell: pwsh
+      shell: cmd
       run: |
-        docker pull nvidia/cuda:13.0.2-base-ubuntu24.04
-        Write-Host "=== Testing with GPU access ==="
-        docker run --rm --gpus all nvidia/cuda:13.0.2-base-ubuntu24.04 bash -c "
-          echo 'Container with GPU access:'
-          nvidia-smi || echo 'nvidia-smi not available in container'
-          cat /etc/os-release
-        "
+        echo === Testing with GPU access ===
+        nvidia-smi
+        echo Windows GPU runner test successful
         
-    - name: Test CUDA Image CPU Only (Windows)
+    - name: Test Windows Container CPU Only
       if: matrix.gpu == false && matrix.os == 'windows'
       timeout-minutes: 10
-      shell: pwsh
+      shell: cmd
       run: |
-        docker pull nvidia/cuda:13.0.2-base-ubuntu24.04
-        Write-Host "=== Testing without GPU access (CPU only) ==="
-        docker run --rm nvidia/cuda:13.0.2-base-ubuntu24.04 bash -c "
-          echo 'CUDA container test successful (CPU only - no GPU access)'
-          cat /etc/os-release
-          nvidia-smi 2>/dev/null || echo 'nvidia-smi not available without --gpus flag (expected)'
-        "
+        echo === Testing without GPU access (CPU only) ===
+        echo Windows CPU-only runner test successful
+        docker --version