VDR should be removed from the right side of the Tech Architecture Specification

[andorsk]

As per the work happening in the TRTF, trustoverip/tswg-trust-registry-tf#91, there has been discussion that the VDR box is not in scope for the Technical Architecture Diagram. Instead, it should be overlayed as an implementation on top of the architecture, not as part of the architecture itself.

https://github.com/trustoverip/TechArch/blob/main/images/functional-hourglass-view.png

More concretely:

The following image:

Becomes two images:

1. The above image without the VDR box to the right.
2. Probably a second image, which exists somewhere else outside the Technical Architecture specification.
   
   IMO: This image is out of scope for the core technical architecture stack, but can be referenced. The design of this architecture probably will take place in the TRTF.

I want to draw some clarity here, that the second image being technically accurate is not the core intent of this issue. The second diagram was a STRAWMAN provided by Jo as a way to describe a potential architecture. The core intent of this issue to describe that the VDR should be removed from the TechArch diagrams and instead described in another system outside of the core spec.

[mwherman2000]

For an alternative 2-layer TSL architecture reference model drawn from a pure software architecture point-of-view, checkout Discussion 37 starting here:
trustoverip/trust-spanning-protocol#37 (comment)

Here's the summary slide from the same thread:
trustoverip/trust-spanning-protocol#37 (comment)