ci: Add CI job for our large tests

.github/workflows/large-tests.yml

@@ -0,0 +1,89 @@
+name: Large tests
+on:
+  push:
+    branches:
+      - "test-large/**"
+  schedule:
+    - cron: "3 0 * * *" # Run every day at 03:00 UTC.
+  workflow_dispatch:
+
+# Disable multiple concurrent runs on the same branch
+# When a new CI build is triggered, it will cancel the
+# other in-progress ones (for the same branch)
+concurrency:
+  group: ${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  # This is already built daily by the "build.yml" file
+  # But we also want to include this in the checks that run on each push.
+  build-container-image:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Get current date
+        id: date
+        run: echo "date=$(date +'%Y-%m-%d')" >> $GITHUB_OUTPUT
+
+      - name: Cache container image
+        id: cache-container-image
+        uses: actions/cache@v4
+        with:
+          key: v4-${{ steps.date.outputs.date }}-${{ hashFiles('Dockerfile', 'dangerzone/conversion/*.py', 'dangerzone/container_helpers/*', 'install/common/build-image.py') }}
+          path: |-
+            share/container.tar.gz
+            share/image-id.txt
+
+      - name: Build Dangerzone container image
+        if: ${{ steps.cache-container-image.outputs.cache-hit != 'true' }}
+        run: |
+          python3 ./install/common/build-image.py
+
+  run-large-tests:
+    runs-on: ubuntu-latest
+    needs:
+      - build-container-image
+    strategy:
+      matrix:
+        group: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Get current date
+        id: date
+        run: echo "date=$(date +'%Y-%m-%d')" >> $GITHUB_OUTPUT
+
+      - name: Restore container image
+        uses: actions/cache/restore@v4
+        with:
+          key: v4-${{ steps.date.outputs.date }}-${{ hashFiles('Dockerfile', 'dangerzone/conversion/*.py', 'dangerzone/container_helpers/*', 'install/common/build-image.py') }}
+          path: |-
+            share/container.tar.gz
+            share/image-id.txt
+          fail-on-cache-miss: true
+
+      - name: Install requirements
+        run: |-
+          sudo apt update -y
+          sudo apt install -y \
+            podman git-lfs libxml2-utils \
+            libqt6gui6 libxcb-cursor0 qt6-qpa-plugins \
+            python3 python3-poetry make
+          poetry install
+
+      - name: Run large tests
+        run: |-
+          export TEST_GROUP_COUNT=20
+          export TEST_GROUP=${{ matrix.group }}
+          poetry run make test-large
+
+      - name: Upload results
+        uses: actions/upload-artifact@v4
+        with:
+          name: results_${{ matrix.group }}
+          path: tests/test_docs_large/results/junit