slapos-sr-testing: Add caucase

Caucase binaries are required for some testing scenarios.
2 jobs for feature/version-up-202110 (queued for 1 second)
Status Job ID Name Coverage
  External
running SlapOS.SoftwareReleases.IntegrationTest-luke/feature/version-up-202110

26387:29:19

running SlapOS.SoftwareReleases.IntegrationTest-py3-luke/feature/version-up-202110

26387:29:20