LLM first example test and template (#8658)

.github/workflows/llm_example_tests.yml

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+name: LLM Example Test
+
+# Cancel previous runs in the PR when you push new commits
+concurrency:
+  group: ${{ github.workflow }}-llm-example-tests-${{ github.event.pull_request.number || github.run_id }}
+  cancel-in-progress: true
+
+# Controls when the action will run. 
+on:
+  schedule:
+    - cron: '00 13 * * *' # GMT time, 13:00 GMT == 21:00 China
+  pull_request:
+    branches: [ main ]
+    paths:
+      - '.github/workflows/llm_example_tests.yml'
+      - '.github/workflows/llm-binary-build.yml'
+      - '.github/actions/llm/example-test/action.yml'
+      - '.github/actions/llm/setup-llm-env/action.yml'
+      - '.github/actions/llm/remove-llm-env/action.yml'
+      - '.github/actions/llm/download-llm-binary/action.yml'
+  workflow_dispatch:
+  workflow_call:
+
+env:
+  INT4_CKPT_DIR: ./llm/ggml-actions/stable
+  LLM_DIR: ./llm
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  llm-cpp-build:
+    uses: ./.github/workflows/llm-binary-build.yml
+  llm-example-test:
+    needs: llm-cpp-build
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.9"]
+        instruction: ["AVX512"]
+    runs-on: [ self-hosted, llm,"${{matrix.instruction}}", ubuntu-20.04-lts ]
+    env:
+      THREAD_NUM: 24
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install --upgrade setuptools==58.0.4
+          python -m pip install --upgrade wheel
+
+      - name: Download llm binary
+        uses: ./.github/actions/llm/download-llm-binary
+
+      - name: Run LLM install (all) test
+        uses: ./.github/actions/llm/setup-llm-env
+        env:
+          ANALYTICS_ZOO_ROOT: ${{ github.workspace }}
+
+      - name: Run LLM example test
+        uses: ./.github/actions/llm/example-test
+        env:
+          ANALYTICS_ZOO_ROOT: ${{ github.workspace }}
+
+      # - name: Clean up test environment
+      #   uses: ./.github/actions/llm/remove-llm-env
+      #   env:
+      #     ANALYTICS_ZOO_ROOT: ${{ github.workspace }}

python/llm/dev/test/run-example-tests.sh

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+# LLAMA2 example test
+if [ ! -d $ORIGINAL_LLAMA2_PATH ]; then
+    echo "Directory $ORIGINAL_LLAMA2_PATH not found. Downloading from FTP server..."
+    wget -r -nH --no-verbose --cut-dirs=1 $LLM_FTP_URL/${ORIGINAL_LLAMA2_PATH:2} -P $LLM_DIR
+fi
+
+if [ -z "$THREAD_NUM" ]; then
+  THREAD_NUM=2
+fi
+export OMP_NUM_THREADS=$THREAD_NUM
+
+std=$(taskset -c 0-$((THREAD_NUM - 1)) python python/llm/example/transformers/transformers_int4/llama2/generate.py --repo-id-or-model-path $ORIGINAL_LLAMA2_PATH)
+echo "the output of the example is: " 
+echo $std
+if [[ ! $std == *"AI is a term"* ]]; then
+    echo "The expected output is not met."
+    return 1
+fi