fix: use PR image for test initialization and verification

- Push PR images to registry for testing
- Use built PR image instead of official postgres images for test setup

Author: adityathebe

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

@@ -55,7 +55,7 @@ jobs:
         with:
           context: .
           platforms: linux/amd64,linux/arm64
-          push: ${{ github.event_name != 'pull_request' }}
+          push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: |
@@ -130,7 +130,8 @@ jobs:
             -v $PWD/test-data/${{ matrix.test.from }}:/var/lib/postgresql/data \
             -e POSTGRES_PASSWORD=testpass \
             -e POSTGRES_DB=testdb \
-            postgres:${{ matrix.test.from }}-bookworm \
+            -e PG_VERSION=${{ matrix.test.from }} \
+            ${{ env.TEST_IMAGE }} \
             bash -c "
               set -e
               set -o pipefail
@@ -201,7 +202,8 @@ jobs:
           cat <<'EOF' | docker run --rm -i \
             -v $PWD/test-data/${{ matrix.test.from }}:/var/lib/postgresql/data \
             -e POSTGRES_PASSWORD=testpass \
-            postgres:${{ matrix.test.to }}-bookworm \
+            -e PG_VERSION=${{ matrix.test.to }} \
+            ${{ env.TEST_IMAGE }} \
             bash -c "
               docker-entrypoint.sh postgres &
               PGPID=\$!