Removal of Legacy Ingest Watchfolder Support [VF 20.2 RN]

Prior to this release, two Ingest Watchfolder Use Cases existed in ConfigPortal under the "Ingest", "Watchfolder" and "Watchfolder (Vidispine)" sections.

"Watchfolder" was actually a legacy ingest use case without VidiCore. As VidiCore is rudimental part of VidiFlo, this legacy support is removed. The former "Watchfolder (Vidispine)" is now renamed to "Watchfolder" and the only ingest use case page in section "Ingest" now.