move github test to use bats

the existing test is now covered there, and we build our own test image
so we can avoid the zothub dep and skopeo dep

Signed-off-by: Michael McCracken <[email protected]>

.github/workflows/build.yaml

@@ -51,12 +51,6 @@ jobs:
 
           echo "writing /etc/lxc/lxc-usernet"
           echo "$u veth lxcbr0 100" | sudo tee -a /etc/lxc/lxc-usernet
-      - name: install skopeo
-        run: |
-          mkdir ~/bin
-          wget -O ~/bin/skopeo --progress=dot:mega https://github.com/project-machine/tools/releases/download/v0.0.1/skopeo
-          chmod 755 ~/bin/skopeo
-          sudo cp -f ~/bin/skopeo /usr/bin/skopeo
       - name: lint
         run: |
           make gofmt
@@ -71,15 +65,7 @@ jobs:
           cp ./bin/atomfs atomfs-${{ matrix.os }}
       - name: test
         run: |
-          export PATH=~/bin:$PATH
-          skopeo copy docker://zothub.io/machine/bootkit/bootkit:v0.0.16.230901-squashfs oci:oci:bootkit-squashfs
-          lxc-usernsexec -s << EOF
-          atomfs mount --persist=upper oci:bootkit-squashfs dest
-          [ -d dest/bootkit ]
-          touch dest/zz
-          atomfs umount dest
-          [ -f upper/zz ]
-          EOF
+          make batstest
       - name: Upload code coverage
         uses: codecov/codecov-action@v4
         with: