Add H100 to Float8 CI for testing (#1575)

Author: jainapurva

.github/workflows/float8_test.yml

@@ -28,6 +28,11 @@ jobs:
             torch-spec: '--pre torch==2.7.0.dev20250122 --index-url https://download.pytorch.org/whl/nightly/cu124'
             gpu-arch-type: "cuda"
             gpu-arch-version: "12.4"
+          - name: H100
+            runs-on: linux.aws.h100
+            torch-spec: '--pre torch torchvision torchaudio --index-url https://download.pytorch.org/whl/nightly/cu124'
+            gpu-arch-type: "cuda"
+            gpu-arch-version: "12.4"
 
     permissions:
       id-token: write