TMP: polish(pu): polish efficiency and performance on atari and dmc

[puyuan1996]

• Optimize efficiency, specifically by replacing deepcopy with a predefined share_kv_cache_pool.
• Add muzero_segmentcollector, enable the buffer reanalyze option, and add the train***_segment.py entry point.
• Refine the configurations for Atari and DeepMind Control environments.

[puyuan1996]

We have a new polished PR https://github.com/opendilab/LightZero/pull/292.