Update GitHub Actions workflow for GPU testing

Author: Jyothirmaikottu

.github/workflows/test-cdk-changes.yaml

@@ -0,0 +1,30 @@
+name: Test - P4D 4 GPUs
+
+on:
+  workflow_dispatch:
+  push:
+    paths:
+      - ".github/workflows/test-cdk-changes.yaml"
+
+jobs:
+  test-gpu-standard:
+    runs-on: gpu-standard-runners
+    steps:
+      - name: Check GPUs
+        run: nvidia-smi
+
+      - name: Check Docker
+        run: |
+          docker info
+          docker run --rm --gpus all nvidia/cuda:12.0-base nvidia-smi
+
+  test-p4d:
+    runs-on: p4d-gpu-runners
+    steps:
+      - name: Check GPUs
+        run: nvidia-smi
+
+      - name: Check Docker
+        run: |
+          docker info
+          docker run --rm --gpus all nvidia/cuda:12.0-base nvidia-smi