Add a new API set_node_direction() to RRGraphBuilder

[m-hariszafar]

Description

This PR focuses on updating routing resource graph builder functions, where we use the refactored data structure RRGraphBuilder to shadow the discrete data structure rr_graph_storage.
This PR aims to fully deprecate the direct use of the legacy API set_direction() from the rr_node data structure.

After this PR, the set_direction API is fully deprecated and the set_node_direction from the refactored data structure RRGraphBuilder is the only way to use it.

Checklist:

• Removed the legacy API set_direction() from rr_node.cpp and rr_node.h
• Added new APIs set_node_direction to data structures RRGraphBuilder, whose comments are Doxygen compatible
• Replaced all the use of set_direction() in builder functions by set_node_direction()

Related Issue

This pull request is a follow-up PR on the routing resource graph refactoring effort #1805

Motivation and Context

This PR is the continuation of the refactoring effort with a focus on shadowing the rr_graph_storage APIs in the RRGraphBuilder data structure.
This PR reworks the set_node_direction() API among the other APIs in #1847

How Has This Been Tested?

• All vtr basic and strong tests are passing.

Types of changes

• Bug fix (change which fixes an issue)
• New feature (change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation
• I have updated the documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed