Addressed PR comments of trino

[dv255037]

Description

This PR addresses review comments from the previous PR and includes the following changes:

Documentation

• Updated teradata.md to address PR feedback
• Improved clarity and accuracy of Teradata connector documentation

Testing

• Added test class to verify class loading behavior
• Ensures proper class loader isolation and functionality

Other Changes

• Applied requested changes to related classes based on PR review feedback

Additional context and related issues

Release notes

( ) This is not user-visible or is docs only, and no release notes are required.
( ) Release notes are required. Please propose a release note for me.
( ) Release notes are required, with the following suggested text:

## Section
* Fix some things. ({issue}`issuenumber`)