Revert "CI: login to container registry at the beginning of the workflow"

This reverts commit 07e3fa7.

Packages should be public now, so they don't require login.
Basically GHCR should work just fine like it was in #930 + commit: da7bdf7.

Author: lukaszstolarczuk

.github/workflows/gha.yml

@@ -33,9 +33,6 @@ jobs:
         with:
           fetch-depth: 50
 
-      - name: Log in to the container registry
-        run: echo "${CONTAINER_REG_PASS}" | docker login ghcr.io -u="${CONTAINER_REG_USER}" --password-stdin
-
       - name: Pull or rebuild the image
         run: cd $WORKDIR && ${{ matrix.CONFIG }} ./pull-or-rebuild-image.sh
 

utils/docker/images/push-image.sh

@@ -43,5 +43,8 @@ then
 	exit 1
 fi
 
+echo "Log in to the container registry"
+echo "${CONTAINER_REG_PASS}" | docker login ghcr.io -u="${CONTAINER_REG_USER}" --password-stdin
+
 echo "Push the image to the container registry"
 docker push ${CONTAINER_REG}:${TAG}