FeedBack control model based on IO size

[bufferflies]

Enhancement Task

RFC PR: tikv/rfcs#101

Each store has a separate sending window to limit the number of snapshot tasks. It will reduce the waiting time and balance sending traffic to multiple stores at the same time.

TASK

• Observability

• • Observer: add some metrics for the waiting queue of snapshot generator.  tikv#12946

• feedback

• • Add some snapshot execution information pingcap/kvproto#981
• • Record the duration of executing the snapshot and feedback to PD Server  tikv#13409

• controller

• • extract interface for the store limit #5730
• • core: multi level sliding windows for limit snapshot task #5518
• • operator influence add snapshot send cost #5531
• • add one configuration to switch store-limit-v2 #5735
• • add new store limit type for limit the snapshot sender. #6104
• • add new store filter and send filer #6145
• • add controller to adjust sliding windows capacity based on the snapshot statistics. #6147
• • operator should cache influence

[nolouch]

also relative #5596