Transform applied to RenderInstances are incorrect when GraphicTemplate is created from a GLTF

[mdastous-bentley]

Describe the bug
When creating instances using a template created from a GLTF, transforms appear to be applied based on the GLTF coordinate system instead of the iModelConnection's spatial coordinate system.

To Reproduce

1. Get this branch
2. Run Display-Test-app
3. Click on the blank connection button in the tool bar.
4. Click on the smiling face icon in the tool bar.

Expected behavior
You should have 3 spheres in the view: red, blue, green. Each sphere has it's center positioned at points described by the structure returned by
the getCirclesData function:

Each sphere should contains a model, creating from instancing a GLTF template:

You will notice, the green sphere has no gltf instance inside it, instead it got positioned incorrectly:

It should be placed at the center of the sphere, like the two others spheres. The problem arise because the position of the green sphere has a delta value added on the Z-axis.
Our assumption is that, the axis orientation is based on the GLTF coordinate system.

[pmconne]

@markschlosseratbentley @danieliborra