ci: Do not run `rbld list` in gem_sanity configuration
ci: Do not run `rbld list` in gem_sanity configuration

Gem sanity configuration should not require docker.

Signed-off-by: Dmitry Fleytman <a8cf97adadec4e1b734a39bc5aea71b5741cfca1@daynix.com>

daynix/rebuild,rbld/rebuild,daynix/rebuild,rbld/rebuild,rbld/rebuild,daynix/rebuild