replace table_schema by schema_name

[rmaxu]

Description

SVV_ALL_TABLES does not have table_schema column (https://docs.aws.amazon.com/redshift/latest/dg/r_SVV_ALL_TABLES.html)

Motivation and Context

Testing

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist

• Local run of ./build.sh succeeds
• Code changes have been run against the repository's pre-commit hooks
• Commit messages follow Conventional Commit Specification
• I have read the README document
• I have added tests to cover my changes
• I have run all unit tests using pytest test/unit and they are passing.

• By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[Brooke-white]

Hi @rmaxu , thank you for identifying and creating a fix for #198. We appreciate your contribution 🚀