HF RL Explorer

Add a reusable Amber NVE benchmark test to the test library

Add a reusable Amber NVE benchmark test to the test library: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). Our portability test library ( hpctestlib ) should ship a ready-to-use, site-agnostic regression test for the Amber (https://ambermd.org/)…

The task

Our portability test library (`hpctestlib`) should ship a ready-to-use, site-agnostic regression test for the [Amber](https://ambermd.org/) molecular-dynamics suite, so that individual sites can subclass it and only add their machine-specific bits (modules, valid systems, references, task counts).

Part of FineEnvs/MiMo-V2.6-RL-harbor-code.