add ci for layerstest

Author: PhaneeshB

.github/workflows/ci-sharktank.yml

@@ -187,6 +187,20 @@ jobs:
             --iree-device=hip://0 \
             --device=cuda:0
 
+      - name: Run sharktank layers tests
+        if: ${{ !cancelled() }}
+        run: |
+          pytest sharktank/tests/layers \
+            --durations=10 \
+            --capture=no \
+            --log-cli-level=info \
+            -v \
+            --iree-hal-target-device=hip \
+            --iree-hip-target=gfx942 \
+            --iree-device=hip://0 \
+            --parameters=/shark-dev/ossci-models/llama_3_1/405b/fp4/fp4_preshuffled_2025_09_12.irpa \
+            --device=cuda:0
+
   test_with_data:
     name: "Data-dependent Tests"
     strategy: