[fix] Improve logic for local deployment of PythonScript

[mikita-sakalouski]

Improving the logic of getting project root in Workspace based on yaml config, instead of project name.

Description

Reuse MultiManager to get brick flow project root inside DataBricks

Related Issue

Motivation and Context

How Has This Been Tested?

Rerun all tests

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[newfront]

This change looks good to go.