part of https://github.com/coder/internal/issues/912
Adds CLI command `coder exp scaletest dynamic-parameters`
I've left out the configuration of tracing and timeouts for now. I think I want to do some refactoring of the scaletest CLI to make handling those flags take up less boiler plate.
I will add tracing and timeout flags in a follow up PR.
relates to https://github.com/coder/internal/issues/912
Adds a new scaletest Runner to generate dynamic parameters load.
A later PR will add the CLI command, including creating the template & version.