Align timeout with qnn llama

Author: winskuo-quic

.github/workflows/pull.yml

@@ -450,7 +450,7 @@ jobs:
       docker-image: executorch-ubuntu-22.04-qnn-sdk
       submodules: 'true'
       ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
-      timeout: 180
+      timeout: 900
       script: |
         # The generic Linux job chooses to use base env, not the one setup by the image
         CONDA_ENV=$(conda env list --json | jq -r ".envs | .[-1]")