- Introduced the SmartlingLocalizationProvider abstract class to interface with Smartling backend for authentication, uploading and downloading of .po files.
- Subclasses of SmartlingLocalizationProvider can now be used as part of the Localize UAT command for automation.
#jira: none
#rb: Vincent.Gauthier, Jamie.Dale
#preflight: 632240dd506f1a33e0e3b52f
[CL 22030197 by leon huang in ue5-main branch]
