Fix postgres connector issues

[huyphung1602]

Summary

Fix postgres connector issues related to:

• Duplicated fields
• Failed to fetch enums if there is the same enum_type name in different schemas.
  Fix wrong enums when fetching in mssql.

Issue

(issue link here)

Lasting Changes (Technical)

• Fix the eslintrc to parse ts file correctly
• Remove wrong enums when fetching in mssql
• Update the sql which fetching tables, fields, and comments to avoid fetching duplicated fields
• Update the sql which fetching enums to support the same enum_type name in different schema_name

Checklist

Please check directly on the box once each of these are done

• Documentation (if necessary)
• Tests (integration test/unit test)
• Integration Tests Passed
• Code Review

[huyleminh01]

LGTM