ci: replace Python test suite with BATS and consolidate workflows

Replace the pytest/testinfra/tox test stack with BATS, aligning with
the approach used in the FTL repository.

- Merge build-and-test.yml into build-and-publish.yml; the combined
  lint+test job now runs on pull_request via a single bash test/run.sh
  call, removing the need for Python/tox in CI
- Replace Python test files with test/run.sh and test/test_suite.bats
- test/run.sh handles image build, BATS install, container lifecycle,
  and cleanup via trap in one place
- Containers consolidated from 6 to 2 (CONTAINER_DEFAULT and
  CONTAINER_CUSTOM), removing tests that belong to FTL's own suite
- Tests now focus on Docker-specific behaviour: entrypoint, signal
  handling, UID/GID mapping, cron setup, and password assignment

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Adam Warner <me@adamwarner.co.uk>

.github/workflows/build-and-publish.yml

@@ -16,7 +16,39 @@ env:
   components_branch: ${{ github.event_name == 'release' && 'master' || 'development' }}
 
 jobs:
+  test:
+    if: github.event_name == 'pull_request'
+    runs-on: ${{ matrix.runner }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - platform: linux/amd64
+            runner: ubuntu-latest
+          - platform: linux/386
+            runner: ubuntu-latest
+          - platform: linux/arm/v6
+            runner: ubuntu-24.04-arm
+          - platform: linux/arm/v7
+            runner: ubuntu-24.04-arm
+          - platform: linux/arm64
+            runner: ubuntu-24.04-arm
+          - platform: linux/riscv64
+            runner: ubuntu-24.04-arm
+    env:
+      CI_ARCH: ${{ matrix.platform }}
+    steps:
+      - name: Checkout Repo
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd #v6.0.2
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@ce360397dd3f832beb865e1373c09c0e9f86d70a #v4.0.0
+
+      - name: Test
+        run: CIPLATFORM=${{ env.CI_ARCH }} bash test/run.sh
+
   build-prepare:
+    if: github.event_name != 'pull_request'
     runs-on: ubuntu-24.04
     outputs:
       components_branch: ${{ env.components_branch }}
@@ -25,6 +57,7 @@ jobs:
       - run: echo "Exposing env vars for reusable workflow"
 
   build:
+    if: github.event_name != 'pull_request'
     uses: docker/github-builder/.github/workflows/build.yml@v1
     needs:
       - build-prepare
@@ -45,7 +78,7 @@ jobs:
         WEB_BRANCH=${{ needs.build-prepare.outputs.components_branch }}
         PADD_BRANCH=${{ needs.build-prepare.outputs.components_branch }}
       platforms: linux/amd64,linux/386,linux/arm/v6,linux/arm/v7,linux/arm64,linux/riscv64
-      push: ${{ github.event_name != 'pull_request' }}
+      push: true
       set-meta-labels: true
       meta-images: |
         pihole/pihole

.github/workflows/build-and-test.yml

@@ -1,54 +0,0 @@
-name: Build Image and Test
-on:
-  pull_request:
-
-permissions:
-  contents: read
-
-jobs:
-  build-and-test:
-    runs-on: ${{ matrix.runner }}
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - platform: linux/amd64
-            runner: ubuntu-latest
-          - platform: linux/386
-            runner: ubuntu-latest
-          - platform: linux/arm/v6
-            runner: ubuntu-24.04-arm
-          - platform: linux/arm/v7
-            runner: ubuntu-24.04-arm
-          - platform: linux/arm64
-            runner: ubuntu-24.04-arm
-          - platform: linux/riscv64
-            runner: ubuntu-24.04-arm
-    env:
-      CI_ARCH: ${{ matrix.platform }}
-    steps:
-    - name: Checkout Repo
-      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd #v6.0.2
-
-    - name: Set up QEMU
-      uses: docker/setup-qemu-action@ce360397dd3f832beb865e1373c09c0e9f86d70a #v4.0.0
-
-    - name: Set up Python
-      uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 #v6.2.0
-      with:
-        python-version: "3.13"
-
-    - name: Run black formatter
-      run: |
-        pip install black
-        black --check --diff test/tests/
-
-    - name: Install wheel
-      run:  pip install wheel
-
-    - name: Install dependencies
-      run: pip install -r test/requirements.txt
-
-    - name: Test with tox
-      run: |
-        CIPLATFORM=${{ env.CI_ARCH }} tox -c test/tox.ini