nightly-2023-12-05: chore: move databus tests to the new test folder (#3680)

# Description

## Problem\*

databus PR was using old test folder

## Summary\*

databus test case is moved to the new test folder.

## Additional Context



## Documentation\*

Check one:
- [X] No documentation needed.
- [ ] Documentation included in this PR.
- [ ] **[Exceptional Case]** Documentation to be submitted in a separate
PR.

# PR Checklist\*

- [X] I have tested the changes locally.
- [X] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.