(deprecated): remove the use of deprecated Image, Mesh and Array API

What does this MR do?

• Remove the last remaining usage of the deprecated API of Image, Array and Mesh outside of fwData and fwDataTools: add a 2 after get/setSize, get/setOrigin, get/SetSpacing.
• Fix dump lock on Image and Arry iterators: lock bust be called before accessing the buffer.
• Improve the documentation about the dump lock.

How to test it?

Launch all the applications and tests and see that nothing is broken and that we no longer use deprecated API from Image, Mesh and Array.

Associated Issues/Merge Requests

• Issues
  • Refs #473 (closed)