workflow: Add integration tests, bump go version

Setup Bats and run integration tests with them after build.

+ bump go compiler to version 1.23

.github/workflows/build_and_maybe_release.yml

@@ -8,13 +8,13 @@ jobs:
   build:
     env:
       RELEASE_OS: ubuntu-24.04
-      RELEASE_GOVER: "1.22"
+      RELEASE_GOVER: "1.23"
 
     strategy:
       fail-fast: false
       matrix:
         os: [ ubuntu-24.04, ubuntu-22.04, ubuntu-20.04 ]
-        gover: [ "1.22", "1.21", "1.20" ]
+        gover: [ "1.23", "1.22", "1.21", "1.20" ]
 
     runs-on: ${{ matrix.os }}
 
@@ -23,8 +23,17 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.gover }}
+      - name: Setup Bats
+        uses: bats-core/bats-action@3.0.0
       - name: Build the project
         run: go build .
+      - name: Run integration tests
+        env:
+          # For `bats -F pretty`
+          TERM: xterm-256color
+        run: |
+          sudo -b ./docker-on-top
+          bats -F pretty tests/
       - name: Save built binary
         if: startsWith(github.ref, 'refs/tags/') && matrix.os == env.RELEASE_OS && matrix.gover == env.RELEASE_GOVER
         uses: actions/upload-artifact@v4