docs: cdiwadkar16-patch-4-1 - Stylistic changes

docs: grammar: HA and LB

docs: grammar: cluster operation

docs: grammar: cluster deployment

docs: grammar: clustering

docs: typo and grammar: Cache

docs: grammar: data subscription

docs: grammar: continuous query

Made mostly stylistic changes.

Small grammar updates to the high availability and load balancing page within clusters.

Small grammar updates to cluster operations.

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

docs: grammar: select data

docs: grammar: opentsdb line protocol

docs: grammar: inserting data sql

docs: grammar: inserted

Grammar updates to Developer Guide > Select Data

Small grammar updates.

Some grammar updates to Inserting Data > SQL

Small grammar edits.

test: add test case for fill query

fix(query): fixed a heap buffer overflow bug

docs: remove broken link

docs: grammar: Data Model

Made grammar changes to the Data Model page.

docs: grammar: Connect to TDengine

Made some grammar and reworded the differences between connectors.

docs: stylistic and phrasing changes

Seems like previous PR was overwritten and reverted to original.