feat(vxetable): 新增 clearEdit 方法 (#3369)

Co-authored-by: gavin-james <meaganlindesy1258@gmail.com>

src/components/VxeTable/src/methods.ts

@@ -158,6 +158,7 @@ export const gridComponentMethodKeys: (
   'setEditRow',
   'setEditCell',
   'setSelectCell',
+  'clearEdit',
 
   // vxe-table-validator
   'clearValidate',