** What type of PR is this? **:

/kind feature

What this PR does / why we need it:

Proposal @travelliu as Sig Connectors Committer,
@travelliu has launched a new Connector project in openGauss community.
https://gitee.com/opengauss/openGauss-connector-go-pq
This pr will also add openGauss-connector-go-pq into Sig Connectors.

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

Special notes for your reviewer:

Release note:

NONE