Unexpected Results from GatherText commandlet

These changelists help alleviate another chunk of editor-only data being processed for text gathering when it’s undesired.

2621214 Editor-only data is now gathered for localization by opting-in through a new setting.

2621217 Updated engine localization configuration scripts to use the new setting to gather text from editor-only data.

2621233 Made PinFriendlyName and relevant methods defined only in editors that have WITH_EDITORONLY_DATA evaluating as true.

2621263 Added ShouldGatherFromEditorOnlyData setting to localization dashboard UI for gathering from assets and metadata.