slapos: Add new command slapos node promise

  Introduce a new command for run promises only, from all partitions. This helps to perform quick
  checks.
.gitlab-ci.yml not found in this commit
Status Job ID Name Coverage
  External
canceled SLAPOS-EGG-TEST

failed SLAPOS-EGG-TEST

00:07

failed SLAPOS-EGG-TEST

00:16