Initial haswell-workstation build

Parameterize the GitLab CI script and add the profile change to the
Containerfile.
1 job for main in 3 minutes and 29 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
failed Build haswell-workstation #406
nest

00:03:29

 
Name Stage Failure
failed
Build haswell-workstation Build
 * due to the above autounmask change(s). The --autounmask-backtrack=y
* option can be used to force further backtracking, but there is no
* guarantee that it will produce a solution.
subprocess exited with status 1
subprocess exited with status 1
error building at STEP "RUN emerge -v --update --deep --newuse --with-bdeps=y @world": exit status 1
level=error msg="exit status 1"
Cleaning up file based variables
ERROR: Job failed: exit code 1