fix(item): patch to rename duplicate item_code values to name

[sahil28297]

  File "/home/frappe/frappe-bench/apps/erpnext/erpnext/patches/v11_0/make_quality_inspection_template.py", line 9, in execute
    frappe.reload_doc('stock', 'doctype', 'item')
  File "/home/frappe/frappe-bench/apps/frappe/frappe/__init__.py", line 818, in reload_doc
    return frappe.modules.reload_doc(module, dt, dn, force=force, reset_permissions=reset_permissions)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/modules/utils.py", line 174, in reload_doc
    return import_files(module, dt, dn, force=force, reset_permissions=reset_permissions)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/modules/import_file.py", line 27, in import_files
    reset_permissions=reset_permissions)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/modules/import_file.py", line 32, in import_file
    ret = import_file_by_path(path, force, pre_process=pre_process, reset_permissions=reset_permissions)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/modules/import_file.py", line 66, in import_file_by_path
    ignore_version=ignore_version, reset_permissions=reset_permissions)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/modules/import_file.py", line 141, in import_doc
    doc.insert()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 260, in insert
    self.run_post_save_methods()
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 924, in run_post_save_methods
    self.run_method("on_update")
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 794, in run_method
    out = Document.hook(fn)(self, *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 1064, in composer
    return composed(self, method, *args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 1047, in runner
    add_to_return_value(self, fn(self, *args, **kwargs))
  File "/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py", line 788, in <lambda>
    fn = lambda self, *args, **kwargs: getattr(self, method)(*args, **kwargs)
  File "/home/frappe/frappe-bench/apps/frappe/frappe/core/doctype/doctype/doctype.py", line 282, in on_update
    raise e
frappe.exceptions.ValidationError: item_code field cannot be set as unique in tabItem, as there are non-unique existing values