Add Trino Connection UI Fields Placeholders

[wei-juncheng]

closes: #45841

• Implementation
• E2E Test

What

• I added description text for the fields on the Trino connection creation page to make it easier for users to operate client tags and other connection-related settings.

How

• providers/trino/src/airflow/providers/trino/hooks/trino.py
  • Implement get_ui_field_behaviour() to display tooltip text on the fields in the webserver UI.

Test

• I followed the instructions on the page to operate the client tag feature in my local environment and successfully added client tags information to the Trino query.
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