Sri Varshitha 95efdc847f chore: Update list tables test cases and cleanup test database (#1600) ...

## Description

---
This change updates the list tables(`postgres`, `mysql` and `mssql`)
tests with test cases for listing all tables. The test schemas are
cleaned at the beginning of the test run to ensure deterministic output
for the list_tables tool.
## PR Checklist

---
> Thank you for opening a Pull Request! Before submitting your PR, there
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- [x] Make sure you reviewed

[CONTRIBUTING.md](https://github.com/googleapis/genai-toolbox/blob/main/CONTRIBUTING.md)
- [ ] Make sure to open an issue as a

[bug/issue](https://github.com/googleapis/genai-toolbox/issues/new/choose)
before writing your code! That way we can discuss the change, evaluate
  designs, and agree on the general idea
- [x] Ensure the tests and linter pass
- [x] Code coverage does not decrease (if any source code was changed)
- [x] Appropriate docs were updated (if necessary)
- [x] Make sure to add `!` if this involve a breaking change

🛠️ Fixes #<issue_number_goes_here>

2025-10-01 09:49:24 +05:30

..

mssql_integration_test.go

chore: Update list tables test cases and cleanup test database (#1600)

2025-10-01 09:49:24 +05:30