(fwRenderOgre): use the new API for Mesh, Image and Array

What does this MR do?

Refactor fwRenderOgre and uiVisuOgre to use new Image, Array and Mesh API.

How to test it?

Launch TutoOgreGenericScene and OgreViewer and check that nothing is broken.

Associated Issues/Merge Requests

• Issues

  • Closes #418 (closed)

• Merge requests

  • depends on !373 (merged)