* should pickup the external directories registered by the project
* Add support for AzTest and AzTestRunner in the SDK
* missing IMPORT_LIB
* Moved where .Assets targets get generated so they are visible in the SDK
* generate the Directory.Build.props in the right path
* excluding target on platforms that dont support it
- Enable the previously failing network unit tests for TcpTransportTests for Linux: TestSingleClient and TestMultipleClients
- Switch Linux to use SELECT implementation of the TCP Socket Manager instead of the EPOLL version (root cause of the failure)
Remove from CryCommon and CrySystem:
- MemoryManager and all related classes/files
- StreamEngine, ResourceManager, ImageHandler, and AsyncPakManager
- Various other related interfaces/files/classes etc. that are all now unused