I haven't used Actions in a professional context so am just wondering (and this might help coming up with arguments should $c-suite start requiring a move): is a "runner" equivalent to an executor slot in Jenkins? As an example, we currently have some builders with 20 executor slots and they might all be orchestrating test runs in parallel (these do not consume much CPU as all they are doing is instructing _other_ VMs, created on the fly, to do the actual work). Would that count as 20 runners in Github Actions, hence costing $0.002/minute times 20?