Rename jljusten => jljusten_vk; Add jljusten job for gl; Adjust trigger branches

jljusten job renamed to jljusten_vk; trigger branch changes to ci_mesa_repo/dev/jljusten/vk

jljusten job re-added, but now tests gl and triggers on branch ci_mesa_repo/dev/jljusten/gl

Cc: @majanes, @ngcortes, @ybogdano