Enhance topSQL with Network/IO dimensions

[yibin87]

Enhancement

TiDB

• Enhance topsql to pick topN network usage SQL #62919
• Collect SQL network usage for topsql #62920

TiKV

• Add grpc wait time metrics to better observe grpc overloading cases tikv/tikv#18809
• Add alert rule and SOP doc for grpc overloading situations
• Enhance topsql to pick topN io/network usage SQL tikv/tikv#18814
  • Aggregate RawRecords before picking topN records tikv/tikv#18844
  • Collect network and IO data for topSQL usage tikv/tikv#18815

kvproto

• Update topsql related protocol to support io/network dimension info kvproto#1336

tipb

• topsql_agent: Add network fields for topsql agent tipb#379

O11Y