initial CI workflow enabling (intel#21)

.github/ci_commit_pins/pytorch.txt

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+001bf1d06b813f4c592cc13ce594cce5f8bd0721

.github/workflows/pull.yml

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+name: pull
+
+on:
+  pull_request:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
+
+permissions: read-all
+
+jobs:
+  preci-ut:
+    # Don't run on forked repos
+    if: github.repository_owner == 'intel'
+    name: preci-ut
+    runs-on: linux.idc.xpu
+    timeout-minutes: 240
+    steps:
+      - name: Checkout torch-xpu-ops
+        uses: actions/checkout@v3
+      - name: Prepare Stock Pytorch
+        run: |
+          pwd
+          cd ../ && rm -rf pytorch
+          git clone https://github.com/pytorch/pytorch
+          cd pytorch && git checkout `cat ../torch-xpu-ops/.github/ci_commit_pins/pytorch.txt` && git submodule sync && git submodule update --init --recursive
+          rm -rf third_party/torch-xpu-ops && cp -r ../torch-xpu-ops third_party/
+      - name: Build Pytorch XPU
+        run: |
+          source activate xpu_op_${ZE_AFFINITY_MASK}
+          conda install cmake ninja -y
+          conda install intel::mkl-static intel::mkl-include -y
+          cd ../pytorch
+          pip install -r requirements.txt
+          export USE_XPU=1
+          source /opt/intel/oneapi/compiler/latest/env/vars.sh
+          export CMAKE_PREFIX_PATH=${CONDA_PREFIX:-"$(dirname $(which conda))/../"}
+          python setup.py bdist_wheel
+          pip install --force-reinstall dist/*.whl
+      - name: Run XPU OP UT
+        run: |
+          xpu-smi discovery 
+          source /opt/intel/oneapi/compiler/latest/env/vars.sh
+          source activate xpu_op_${ZE_AFFINITY_MASK}
+          cd test/python
+          timeout 8000 pytest -v 2>&1 | tee torch_xpu_ops_ut.log
+      - name: Run Torch XPU UT
+        run: |
+          source /opt/intel/oneapi/compiler/latest/env/vars.sh
+          source activate xpu_op_${ZE_AFFINITY_MASK}
+          cd ../pytorch
+          TEST_REPORTS_DIR=$(pwd)/test/test-reports
+          rm -rf "$TEST_REPORTS_DIR" && mkdir -p "$TEST_REPORTS_DIR"
+          # Run Pytorch XPU binary UT
+          for xpu_case in build/bin/*{xpu,sycl}*; do
+            if [[ "$xpu_case" != *"*"* && "$xpu_case" != *.so && "$xpu_case" != *.a ]]; then
+              case_name=$(basename "$xpu_case")
+              echo "Testing ${case_name} ..."
+              "$xpu_case" --gtest_output=xml:"$TEST_REPORTS_DIR"/"$case_name".xml
+            fi
+          done
+          # Run Pytorch XPU python UT
+          sed -i 's/selected_tests = exclude_tests(XPU_BLOCKLIST.*/selected_tests = XPU_TEST/g' ./test/run_test.py
+          python test/run_test.py --xpu