Add new function get_all_rtl_files to functions.py

[FrankOu2001]

Description

Add new function get_all_rtl_files. It returns the file paths of all modules that the top_module depends on, with the path of top_module as the first element in the list.

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Write building script to use this function.

• Build µFTB
• Build TageSC
• Build ITTage

Checklist:

• My code follows the style guidelines of this project
• I have added the appropriate labels
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules