Test pkgci_core_tests job (precursor to test_gpu jobs).

.github/workflows/pkgci_core_tests.yml

@@ -0,0 +1,48 @@
+name: PkgCI core tests
+on:
+  pull_request:
+    paths:
+      - ".github/workflows/pkgci_core_tests.yml"
+  workflow_dispatch:
+
+concurrency:
+  # A PR number if a pull request and otherwise the commit hash. This cancels
+  # queued and in-progress runs for the same PR (presubmit) or commit
+  # (postsubmit). The workflow name is prepended to avoid conflicts between
+  # different workflows.
+  group: ${{ github.workflow }}-${{ github.event.number || github.sha }}
+  cancel-in-progress: true
+
+jobs:
+  core_tests:
+    runs-on: ubuntu-20.04
+    env:
+      BUILD_DIR: build-tests
+      VENV_DIR: ${{ github.workspace }}/.venv
+    steps:
+      - name: "Checking out repository"
+        uses: actions/checkout@v4
+      - name: "Checking out runtime submodules"
+        run: ./build_tools/scripts/git/update_runtime_submodules.sh
+      - name: "Setting up Python"
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+      - name: "Setup Python venv"
+        run: python3 -m venv ${VENV_DIR}
+      - name: "Installing IREE nightly release Python packages"
+        run: |
+          source ${VENV_DIR}/bin/activate
+          python3 -m pip install \
+            --find-links https://iree.dev/pip-release-links.html \
+            iree-compiler iree-runtime
+      - name: "Building tests"
+        run: |
+          source ${VENV_DIR}/bin/activate
+          ./build_tools/pkgci/build_tests_using_package.sh ${VENV_DIR}/bin
+      - name: "Running tests"
+        env:
+          IREE_EXTRA_COMMA_SEPARATED_CTEST_LABELS_TO_EXCLUDE: test-type=lit-test
+        run: |
+          source ${VENV_DIR}/bin/activate
+          ./build_tools/cmake/ctest_all.sh ${BUILD_DIR}