Development Task

• Refactor tsoClient to make adopting the later changes easier.
  • client/tso: organize the methods of TSO dispatcher #8121
  • client/tso: decouple tsoClient and tsoDispatcher #8134
• Introduce the backoff mechanism into the critical paths.
  • client/tso: improve the switching of TSO stream #8123
  • GetTS and GetLocalTS.
  • Member update.
• Smooth the TSO internal dispatch to reduce the failure rate.
  • After the leader changed, the first tso request cannot be directly forwarded to the new leader #7997