revert(omny): otransfer_park_loadlock_slot confirmation back to CLI, not GUI

Requested revert of one call site from the earlier GUI-console-confirm
sweep: this confirmation is about the operator physically checking the
leica transfer's back position, not something they'd be watching the
camera GUI console for, so it stays a plain terminal yesno() prompt.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018Mupip8x7Hean6E3FFvpbj

csaxs_bec/bec_ipython_client/plugins/omny/omny_sample_transfer_mixin.py

@@ -493,7 +493,10 @@ class OMNYSampleTransferMixin:
             )
         # if the valve of the loadlock is not closed, ask before movement
         # todo if(epics_get("XOMNY-ES1-LL1VG1:POSITION")!="CLOSED") {
-        if not self.otransfer_confirm_dialog("Please confirm that the leica transfer is in back position."):
+        # CLI prompt on purpose, not otransfer_confirm_dialog() -- the operator
+        # is physically at the loadlock/leica transfer, not watching the GUI
+        # camera console, when confirming this.
+        if not self.OMNYTools.yesno("Please confirm that the leica transfer is in back position."):
             raise OMNYTransferError("Leica shuttle is not in back position.")
         else:
             self._oparkz_leica_slot(slot_number)