Release v9.1.6

• [minor-fix] patch fix
• [fix] remove explicit variant save
• [fix] Do not append description to variant if description already exists (#11204)
• [hot-fix] sql getting translated (#11243)
• [hotfix] fixed 'ValueError: Unknown string format' error if the from_time value is null (#11162)
• [fix] Fetch raw material rate based on last purchase rate (#11205)
• [Fix] Getting an error duplicate name while making an invoice in draft mode (#11230)
• [Fix] Disable desk access view to supplier (#11234)
• Update payment_entry_reference.json
• [minor] fixed AttributeError: 'GrossProfitGenerator' object has no attribute 'grouped_data' (#11195)