Improve Readability and Maintainability of truss_handle.py

[AmadouO20]

Problem:
The truss_handle.py file has become difficult to read and maintain due to its complexity. To ensure the future of the codebase and to make it easier for new contributors/users to understand the file.

Proposed Solution:
Refactor Code into Smaller Functions
Adhere to Coding Standards: such as PEP 8 standards

Alternatives
Another alternative is FLAK8 and reduce the length of some lines.

Additional context
For example, the function docker_run in truss_handle.py can be refactored as it has >100 lines.