fix: tsdb read invalid memory read issue

fix: reset table scan status

fix: remove tmp field

fix: synchronize access within walFsync

test: add cases for ts-2440

fix(query): fix error for retrieve data only in last files.

fix: return dropping dnode in status resp

fix: no core file generated issue on linux

 enh: vote for higher lastLogTerm despite commitIndex

enh: read mnode file

* fix: add test cases;

* fix(query): fix error for retrieve data only in last files.

enh: add version for show cluster

fix: error code not returned issue

fix:table name error in schemaless

enh: refact raft store file read write