Added a new `PrepareBackup` RPC for snapshot backup#1204

Merged

YuJuncen merged 10 commits intopingcap:masterfrom YuJuncen:advanced-prepare

Jan 9, 2024

+1,158-280

Commits on Dec 1, 2023

Merge branch 'master' of https://github.com/pingcap/kvproto into advanced-prepare
YuJuncen
committed

Commits on Dec 5, 2023

Merge branch 'master' of https://github.com/pingcap/kvproto into advanced-prepare
YuJuncen
committed

Commits on Dec 28, 2023

Commits on Jan 9, 2024

address comments
YuJuncen
committed