Avoid passing aws_conn_id as conn_args for psycopg2.connect

[gabrielsyapse]

• In the postgres hook code, the conn_args was changed from a whitelist to blacklist at some point
• aws_conn_id should be removed from conn_args and not passed to psycopg2.connect
• the psycopg2 fails to create the connection because aws_conn_id is an unknown param to postgres

[boring-cyborg]

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[xinbinhuang]

@gabrielsyapse Hi thanks for the contribution! The change looks fine to me, but it seems that this's more a problem on the usage than the actual code itself. - *_conn_id should never go into the extra field in any situation. I wonder what's the use case and problem you have?

[gabrielsyapse]

@ xinbinhuang thanks for the reply, line 48-52 of this file documents the usage. also it was working previously in airflow 1.x

extras example: ``{"iam":true, "aws_conn_id":"my_aws_conn"}``

[xinbinhuang]

@gabrielsyapse ah you're right! Would you mind also adding a test case here? This can help us avoid this from happening again in the future.

[github-actions]

The PR is likely OK to be merged with just subset of tests for default Python and Database versions without running the full matrix of tests, because it does not modify the core of Airflow. If the committers decide that the full tests matrix is needed, they will add the label 'full tests needed'. Then you should rebase to the latest main or amend the last commit of the PR, and push it with --force-with-lease.

[jhtimmins]

@gabrielsyapse can you try rebasing and then running the pre-commit checks on this? That should address the failing static check https://github.com/apache/airflow/blob/main/STATIC_CODE_CHECKS.rst

[boring-cyborg]

Awesome work, congrats on your first merged pull request!