Enable cosign on build / ditch cas from action (#167)

.github/workflows/publish.yml

@@ -62,6 +62,7 @@ jobs:
           args: |
             --${{ matrix.architecture }} \
             --target /data \
+            --cosign \
             --generic $GIT_TAG_NAME
         env:
           CAS_API_KEY: ${{ secrets.CAS_TOKEN }}

action.yml

@@ -17,24 +17,10 @@ runs:
         fi
         echo "version=${input}" >> "$GITHUB_OUTPUT"
 
-    - uses: home-assistant/actions/helpers/cas@master
-
     - shell: bash
       run: |
         docker pull ghcr.io/home-assistant/amd64-builder:${{ steps.version.outputs.version }}
 
-    - shell: bash
-      run: |
-        for j in {1..15}; do
-          if CAS_API_KEY= cas authenticate --silent --signerID [email protected] docker://ghcr.io/home-assistant/amd64-builder:${{ steps.version.outputs.version }}; then
-            exit 0
-          fi
-          sleep $((5 * j))
-        done
-
-        echo "Invalid signature!"
-        exit 1
-
     - shell: bash
       id: builder
       run: |