fix(Archicad): Receive all kind of instances

[jozseflkiss]

Description & motivation

To be able to receive all kind of instances.
Found an issue during v.2.15 testing: Receiving nested hosted Revit instances results in duplicates in Archicad.

Changes:

• hosted elements traversals: we don't traverse the "elements" field of the root BlockInstance (they will be traversed by the main element traversal)
• transform appleid only elements via the "definition" property (not via "elements" property)
• ArchicadDefinitionTraversal renamed to ArchicadGeometryCollector

Screenshots:

Checklist:

• My pull request follows the guidelines in the Contributing guide?
• My pull request does not duplicate any other open Pull Requests for the same update/change?
• My commits are related to the pull request and do not amend unrelated code or documentation.
• My code follows a similar style to existing code.
• I have added appropriate tests.
• I have updated or added relevant documentation.