Add typing to more build tools

Feature or enhancement

Right now we support typing in several build tools:

Lines 2 to 4 in 6ce60f1

    
           files = 
        
               Tools/build/compute-changes.py, 
        
               Tools/build/generate_sbom.py

I think that some other files / tools from this folder can benefit from being checked with mypy.

I have a PR ready for Tools/build/update_file.py of parser.c generation.
What else can be easily typed?

	files =
	Tools/build/compute-changes.py,
	Tools/build/generate_sbom.py