chore: Translate transifex_input.json in it_IT

99% of minimum 50% translated source file: 'transifex_input.json'
on 'it_IT'.

Sync of partially translated files: 
untranslated content is included with an empty translation 
or source language content depending on file format

translations/frontend-app-course-authoring/src/i18n/messages/it_IT.json

@@ -327,6 +327,7 @@
   "course-authoring.files-and-upload.addFiles.button.label": "Aggiungi {fileType} s",
   "course-authoring.files-and-upload.action.button.label": "Azioni",
   "course-authoring.files-and-upload.errorAlert.message": "{message}",
+  "course-authoring.files-and-uploads.file-info.transcripts.error.alert": "Transcript failed: \"{error}\"",
   "course-authoring.files-and-uploads.file-info.usage.title": "Utilizzo",
   "course-authoring.files-and-uploads.file-info.usage.loading.message": "Caricamento",
   "course-authoring.files-and-uploads.file-info.usage.notInUse.message": "Attualmente non in uso",
@@ -767,6 +768,7 @@
   "pgn.DataTable.FilterStatus.clearFiltersText": "Cancella filtri",
   "course-authoring.video-uploads.file-info.infoTab.title": "Info",
   "course-authoring.video-uploads.file-info.transcriptTab.title": "Trascrizione ( {transcriptCount} )",
+  "course-authoring.video-uploads.file-info.transcriptTab.notification.screenReader.text": "Transcription error",
   "course-authoring.video-uploads.file-info.infoTab.dateAdded.title": "Data aggiunta",
   "course-authoring.video-uploads.file-info.infoTab.fileSize.title": "Dimensione del file",
   "course-authoring.video-uploads.file-info.infoTab.videoLength.title": "Durata del video",
@@ -1038,6 +1040,7 @@
   "course-authoring..files-and-videos.sort-and-filter.modal.sortByOldestButton.label": "Il più antico",
   "course-authoring..files-and-videos.sort-and-filter.modal.sortBySizeAscendingButton.label": "Dimensione del file (da bassa ad alta)",
   "course-authoring..files-and-videos.sort-and-filter.modal.applyySortButton.label": "Applica",
+  "course-authoring.videos-page.table.transcriptColumn.message": "{message}",
   "course-authoriong.video-uploads.file-info.transcript.error.fileSizeError": "La dimensione del file di trascrizione supera il limite massimo. Per favore riprova.",
   "course-authoriong.video-uploads.file-info.transcript.deleteTranscript": "Cancella",
   "course-authoriong.video-uploads.file-info.transcript.replaceTranscript": "Rimpiazza",