DRT DR Refactor

[bnmfw]

Description

This Issue is derived from Issue 5610. Specifically for the DR Module

Refactoring Requirements

• Clear and Easy code to understand and maintain
• Less number of lines per method
• Cyclomatic complexity less than 20 (preferably less than 10)
• Doxygen Documentation for all functions/classes
• Following google code style c++
• Eliminate code duplication
• clang-tidy clean
• Coverity clean

[bnmfw]

I do not intend to tackle this task directly as I once did for Pin Access. I do however intend to clean stuff whenever I see it on the DRT module and want a designated place to dump those PRs

[maliberty]

CC is a good tool for this sort of thing