WIP RRGraphView node_is_wire() Implementation

[ethanroj23]

Description

In this PR, I have implemented RRGraphView::node_is_wire() throughout VTR. Every time rr_graph.node_type(node) == CHANX || rr_graph.node_type(node) == CHANY was used has been replaced with rr_graph.node_is_wire(node). In order to do this, I followed a pattern similar to that in previous RRGraphView PRs.

Motivation and Context

Removes reliance upon CHANX and CHANY types when determining if node is a wire.

How Has This Been Tested?

I have run the regression QoR testing found at $ ../scripts/run_vtr_task.py regression_tests/vtr_reg_nightly_test3/vtr_reg_qor_chain. Results from these QoR tests can be found below. The file containing all results can be found here

Only rows that are different are shown.

	VTR Before These Changes	With Changes in this PR
vtr_flow_elapsed_time	1	1.005244594
odin_synth_time	1	0.939894168
abc_synth_time	1	0.992427584
max_vpr_mem	1	1.000167355
pack_time	1	1.041704909
place_time	1	0.995212009
min_chan_width_route_time	1	1.002900235
crit_path_route_time	1	1.001591785

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