CI: Add a workflow to be triggered by asv_runner

.github/workflows/triggered.yml

@@ -0,0 +1,66 @@
+name: Triggered
+
+on:
+  workflow_dispatch:
+    inputs:
+      pr_number:
+        description: 'PR Number'
+        required: true
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  ASVRunner:
+    name: test with specific asv_runner
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: ["ubuntu-latest"]
+        python-version: ["3.7", "3.10", "pypy-3.8", "pypy-3.9"]
+        r-version: ['release']
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      # We need Python 3.7 to always be installed, so tests with
+      # multiple environments can run.
+      - name: Set up Python 3.7
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.7
+
+      - name: Set up Python version ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+          cache: pip
+          cache-dependency-path: pyproject.toml
+
+      - name: Setup a browser for more tests
+        uses: browser-actions/setup-chrome@latest
+
+      - name: Set up R version ${{ matrix.r-version }}
+        uses: r-lib/actions/setup-r@v2
+        with:
+          r-version: ${{ matrix.r-version }}
+
+      - name: Install dependencies
+        run: python -m pip install ".[test,hg]"
+
+      - name: Get asv_runner to be tested
+        uses: actions/checkout@v3
+        with:
+          repository: airspeed-velocity/asv_runner
+          ref: refs/pull/${{ github.event.inputs.pr_number }}/head
+          path: latest_asv_runner
+
+      - name: Install asv
+        run: pip install .
+
+      - name: Run tests with the current asv_runner
+        run: ASV_RUNNER="$(pwd)/latest_asv_runner" python -m pytest -v --timeout=300 --webdriver=ChromeHeadless --durations=100 test