test: add minimal test for container based building of images

This commit adds a smoke test that builds the ibcli container
and runs a fedora-41 raw-minimal build to double check that
the container based building actually works.

Thanks to Ondrej for suggesting this.

.github/workflows/go.yml

@@ -13,6 +13,7 @@ jobs:
 
   build:
     runs-on: ubuntu-latest
+    uses:  ./.github/workflows/testdeps.yml
     steps:
     - uses: actions/checkout@v4
 
@@ -21,13 +22,6 @@ jobs:
       with:
         go-version: 'stable'
         
-    - name: Apt update
-      run: sudo apt update
-
-    # This is needed for the container resolver dependencies
-    - name: Install test dependencies
-      run: sudo apt install -y libgpgme-dev libbtrfs-dev libdevmapper-dev podman
-
     - name: Build
       run: go build -v ./...
 

.github/workflows/testdeps.yml

@@ -0,0 +1,10 @@
+name: Install test dependencies
+
+jobs:
+  install:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install test dependencies
+        run: |
+          sudo apt update
+          sudo apt install -y libgpgme-dev libbtrfs-dev libdevmapper-dev podman