Test3.0/lihui

fix: memory leak in schemaless

* enh: cmake git submodule

[TD-15342]

* fix: remove git submodule in cmake for 3.0

fix(sync): set handle when send response

feat: alter table

fix(sync): set handle when send response

fix(query): return error code when connecting to database failed.

enh(sync): raft config change

fix: some problems of planner

fix(query): merge updated data from cache.

fix(rpc): regArg mem leak

feat: alter table

fix(query): extract correct join condition from physical plan.