Improve deltaDebug.py for confidential designs

[oharboe]

Description

deltaDebug.py does not whittle down the .lib and .lef files for macros and it is hard to know what is inside the .odb file. This makes deltaDebug.py inconvenient for confidential designs.

Suggested Solution

Some improvements:

• whittle down .lib and .lef files for macros as well as nets and elements for the .odb file
• use .def file(text) format instead of .odb format for final deliverable such that everything that is delivered can be browsed by a human
• names of ports and nets can convey a lot of information. Introduce name mangling. Rename all nets and elements to identifiers with numbers (net1, net2, net3, element1, element2, etc.).

Additional Context

No response