[ci] Update buildah command and version (#2479)

scripts/ci/gitlab/pipeline/publish.yml

@@ -2,7 +2,7 @@
 # Here are all jobs that are executed during "publish" stage
 
 .build-push-image:
-  image: quay.io/buildah/stable:v1.27
+  image: $BUILDAH_IMAGE
   variables:
     DOCKERFILE: "" # docker/path-to.Dockerfile
     IMAGE_NAME: "" # docker.io/paritypr/image_name
@@ -10,7 +10,7 @@
   script:
     - test "$PARITYPR_USER" -a "$PARITYPR_PASS" ||
       ( echo "no docker credentials provided"; exit 1 )
-    - buildah bud
+    - $BUILDAH_COMMAND build
       --format=docker
       --build-arg VCS_REF="${CI_COMMIT_SHA}"
       --build-arg BUILD_DATE="$(date -u '+%Y-%m-%dT%H:%M:%SZ')"
@@ -19,8 +19,8 @@
       --file ${DOCKERFILE} .
     - echo "$PARITYPR_PASS" |
       buildah login --username "$PARITYPR_USER" --password-stdin docker.io
-    - buildah info
-    - buildah push --format=v2s2 "$IMAGE_NAME:$VERSION"
+    - $BUILDAH_COMMAND info
+    - $BUILDAH_COMMAND push --format=v2s2 "$IMAGE_NAME:$VERSION"
   after_script:
     - buildah logout --all