Create RPCs for Fetching Dynamic Pool Info

[distributedstatemachine]

Description

The python package currently makes 4 queries to subtensor in order to retrieve the dynamic pool info, which leads to a higher latency.

This PR is reduce of the process , but implementing APIs of subtensor that return this information.

Acceptance Criteria

• [ ] The python package should be able to retrieve dynamic pool info for a single pool given a netuid.
• [ ] The python package should be able to retrieve the dynamic pool info for all the pools

Tasks

• [x] Implement dynamic_pool_info: Returns the pool info for a single pool given the netuid
• [x] Implement dynamic_pool_infos: Returns dynamic pool info for all the pools.
• [ ] Update python package