chore: disable builder image generation (#40)

this is not mandatory and we are not sure we want to keep developing
this. as the push is failing (as far as i could read due to org level
permissioning) this commit removes the helmvm builder image build and
publish job from the github action.

we can enable it again in the future if we decide this is a goal we want
to pursuit.

Author: ricardomaraschini

.github/workflows/release-prod.yaml

@@ -41,17 +41,3 @@ jobs:
           prerelease: false
           files: |
             *.tgz
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
-      - name: Login to GitHub Container Registry
-        uses: docker/login-action@v2
-        with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-      - name: Build and Publish HelmVM Builder Server image.
-        uses: docker/build-push-action@v4
-        with:
-          context: .
-          push: true
-          tags: ghcr.io/${{ github.repository }}:${{ env.TAG_NAME }}