Print the version and (partial) runner id in a banner in the log when starting a job

[em-]

The general purpose gitlab-runner nicely prints this when kicking a job:

Running with gitlab-runner 15.7.2 (0e7679e6)
  on here-goes-the-description gPGG42Bx

This is extremely useful to figure out where things went wrong in case of issues or even to ensure a new version got actually picked up when deploying an update.

Can lava-gitlab-runner be taught to do something similar? :)

[sjoerdsimons]

Yeah that's something that was on my mental todo list that i didn't get time to write a ticket for; fwiw this might be something to do in the runner crate rather then in the lava-gitlab-runner (so it's consistent for all runners not just hte lava one)