The method "PrefabLoader::GetRelativePathToProject" has been changed to "PrefabLoader::GenerateRelativePath", and reworked to get a correct relative path. GetFullPath has also been modified to get correct relative paths too. This requires an Asset Processor connection - if one isn't available (like during unit tests), the methods have fallback logic to produce project-relative paths.
With this change, SliceConverter can't use SaveTemplate() to save the file any more, because GetFullPath now expects to find an existing path, which doesn't work for not-yet-created files. Instead, it now has to use the same technique as the Editor and call SaveTemplateToString then save the string out as a file.
Mike Balfour
96905a26d7