Small grammar changes to the Cluster Deployment page

Small grammar edits on Clustering page

There was an odd sentence in this doc, I updated it to reflect what is written in the Chinese version.

Grammar updates to Data Subscription page.

Grammar updates to the Continuous Query page

feat: create mnode

test: modify timestamp of saving consume result row

enh(stream): add error string

test: case for alter stable column

feat(tmq): use tdb as persistent storage

Grammar updates to Developer Guide > Select Data

Small grammar updates.

Some grammar updates to Inserting Data > SQL

Small grammar edits.

test： split udf test case for CI 

Merge branch 'feature/sync-mnode-integration' of https://github.com/taosdata/TDengine into feature/sync-mnode-integration

fix: some problems of parser

enh(query): return open/total cost for each operator.

fix(tmq): unref topic

fix: szBuf leak