* First version of prefab support for dynamic vegetation
* Addressed PR feedback
- Made MockSpawnableEntitiesInterface a proper GMock in AzFramework
- Added Get/SetSpawnableAssetId
- Added lots of comments to better explain things that were asked about in the PR
* Exposed AzFrameworkTestShared on all platforms, not just host platforms
Several UI property handlers were incorrectly using the autoDelete feature by calling UnregisterPropertyType and deleting the pointer themselves, which caused double-delete crashes on application shutdown. PropertyManagerComponent now gracefully handles that condition but also explicitly asserts explaining how the code should be changed, and the "known offenders" have been fixed up to use autoDelete correctly.
Delete:
- I3DEngine
- Missions
- Time of day
- GameEffectsSystem Gem
- ImageProcessing Gem
- SVOGI Gem
- Various other things that don't do anything now that the legacy renderer has been removed.
The actual bug was the "if (!m_engine)" early-out in CreateInstanceNode that needed to be removed, but all the rest of this legacy-based merged mesh code was ripe for removal as well.