refactor(i18n): use common messages for generic button labels (#7020)

A few components defined their own "Cancel", "Close", "Clear" and
"Success" descriptors when commonMessages already has them. Swapped
them over and removed the old ones.

Locale files come from intl:prune-local dropping the now-orphaned
strings across every language.

packages/ui/src/locales/it-IT/index.json

@@ -1274,9 +1274,6 @@
   "files.editor.file-saved-title": {
     "defaultMessage": "File salvato"
   },
-  "files.editor.find-close": {
-    "defaultMessage": "Chiudi"
-  },
   "files.editor.find-in-file": {
     "defaultMessage": "Trova"
   },
@@ -5372,12 +5369,6 @@
   "sharing.invite-players-modal.avatar-alt": {
     "defaultMessage": "Foto profilo di {username}"
   },
-  "sharing.invite-players-modal.cancel": {
-    "defaultMessage": "Annulla"
-  },
-  "sharing.invite-players-modal.cancel-button": {
-    "defaultMessage": "Annulla"
-  },
   "sharing.invite-players-modal.custom-expiry": {
     "defaultMessage": "Personalizzata..."
   },