This starts a BuildService as a separate process, currently defaulting
to the DummyBuildService.
Change-Id: Ic206f00831641d3ffebaa44883b7dc053700b9ca
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10631
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Tested-by: BuildkiteCI
