Console-equivalent and improved-caching conda queue environments

A copy of the queue environment that the Deadline Cloud console onboarding flow adds. The onEnter and onExit actions run the conda-queue-env-enter and conda-queue-env-exit commands, which are provided on service-managed fleet workers and use Rattler on the GitHub website. These commands typically run faster than equivalent operations with conda.

A version of the console-equivalent queue environment that reuses virtual environments across multiple jobs. This setting can significantly improve performance when running many jobs with the same package requirements. By default, persistent environments are stored under ~/.persistent_envs; modify the onEnter and onExit actions to reference a different path.