Initial testing with cirun based GPU CI

.cirun.yml

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+runners:
+  - name: "zarr-gpu-runner"
+    cloud: "gcp"
+    gpu: "nvidia-tesla-t4"
+    instance_type: "n1-standard-1"
+    machine_image: "common-cu123-v20240730-ubuntu-2204-py310"
+    preemptible: true
+    labels:
+      - "cirun-gpu-runner"

.github/workflows/gpu_test.yml

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+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: Test V3
+
+on:
+  push:
+    branches: [ v3 ]
+  pull_request:
+    branches: [ v3 ]
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    name: py=${{ matrix.python-version }}, np=${{ matrix.numpy-version }}, deps=${{ matrix.dependency-set }}
+
+    runs-on: "cirun-gpu-runner--${{ github.run_id }}"
+    strategy:
+      matrix:
+        python-version: ['3.10', '3.11', '3.12']
+        numpy-version: ['1.24', '1.26', '2.0']
+        dependency-set: ["minimal", "optional"]
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: GPU check
+      run: |
+        nvidia-smi
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+        cache: 'pip'
+    - name: Install Hatch
+      run: |
+        python -m pip install --upgrade pip 
+        pip install hatch
+    - name: Set Up Hatch Env
+      run: |
+        hatch env create test.py${{ matrix.python-version }}-${{ matrix.numpy-version }}-${{ matrix.dependency-set }}
+        hatch env run -e test.py${{ matrix.python-version }}-${{ matrix.numpy-version }}-${{ matrix.dependency-set }} list-env
+    - name: Run Tests
+      run: |
+        hatch env run --env test.py${{ matrix.python-version }}-${{ matrix.numpy-version }}-${{ matrix.dependency-set }} run