.github: workflows: Ensure that local base images are used

This commit adds the `--pull-never` flag to the derivative image builds
in order to ensure that the locally built base image is used instead of
a remote pulled one.

Without this flag, buildah may pull the remote tag even if a local copy
with the same tag name exists.

Signed-off-by: Stephanos Ioannidis <root@stephanos.io>

.github/workflows/ci.yml

@@ -132,6 +132,8 @@ jobs:
  labels: ${{ steps.meta_ci.outputs.labels }}
  build-args: |
  BASE_IMAGE=${{ env.GHCR_BASE }}/${{ env.BASE_IMAGE_NAME }}:${{ steps.meta_base.outputs.version }}
+ extra-args: |
+ --pull-never
 
  - name: Build Developer image
  uses: redhat-actions/buildah-build@v2
@@ -142,6 +144,8 @@ jobs:
  labels: ${{ steps.meta_developer.outputs.labels }}
  build-args: |
  BASE_IMAGE=${{ env.GHCR_BASE }}/${{ env.CI_IMAGE_NAME }}:${{ steps.meta_ci.outputs.version }}
+ extra-args: |
+ --pull-never
 
  - name: Push base image
  if: ${{ github.event_name != 'pull_request' }}