Update on "[llm] Add CMake for llama runner"

Summary: As titled. Also add a CI job. Will run a model in next PR.

Test Plan:

Reviewers:

Subscribers:

Tasks:

Tags:

[ghstack-poisoned]

Author: larryliu0820

.github/workflows/pull.yml

@@ -213,3 +213,27 @@ jobs:
     uses: ./.github/workflows/_unittest.yml
     with:
       docker-image: executorch-ubuntu-22.04-clang12
+
+  test-llama-runner-cmake:
+    name: test-llama-runner
+    uses: pytorch/test-infra/.github/workflows/linux_job.yml@main
+    strategy:
+      matrix:
+        include:
+          - build-tool: cmake
+      fail-fast: false
+    with:
+      runner: linux.2xlarge
+      docker-image: executorch-ubuntu-22.04-clang12
+      submodules: 'true'
+      ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
+      timeout: 90
+      script: |
+        # The generic Linux job chooses to use base env, not the one setup by the image
+        CONDA_ENV=$(conda env list --json | jq -r ".envs | .[-1]")
+        conda activate "${CONDA_ENV}"
+
+        BUILD_TOOL=${{ matrix.build-tool }}
+        PYTHON_EXECUTABLE=python bash .ci/scripts/setup-linux.sh "${BUILD_TOOL}"
+        # Test selective build
+        PYTHON_EXECUTABLE=python bash examples/models/llama2/test_llama_runner.sh "${BUILD_TOOL}"