.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 <[email protected]>

Author: stephanosio

.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' }}