Disable eLxr images being built in salsa.debian.org/salsa-ci-team-pipeline
File '.images-elxr.yml' is introduced to support for building images used by the eLxr CI. A priori those images shouldn't be built on the ‘salsa.d.o/salsa-ci-team/pipeline’ project, but only on committer’s own fork. Add a never default condition to elxr-image rule to disable building eLxr images by default on Salsa ci.
Closes #481 (closed)