checker: fix sql insert expr propagate result (fix #24833) (#25136)

Author: Krchi

vlib/orm/orm_result_test.v

@@ -61,6 +61,12 @@ fn test_print_results() {
 		insert account into Account
 	}!
 
+	i := sql db {
+		insert account into Account
+	}!
+
+	println(i)
+
 	count := sql db {
 		select count from Account
 	}!

vlib/v/checker/orm.v

@@ -190,17 +190,13 @@ fn (mut c Checker) sql_expr(mut node ast.SqlExpr) ast.Type {
 	}
 	c.expr(mut node.db_expr)
 	if node.is_insert {
-		node.typ = ast.int_type
+		node.typ = ast.int_type.set_flag(.result)
 	}
 	last_cur_or_expr := c.cur_or_expr
 	c.cur_or_expr = &node.or_expr
 	c.check_orm_or_expr(mut node)
 	c.cur_or_expr = last_cur_or_expr
 
-	if node.is_insert {
-		return ast.int_type
-	}
-
 	return node.typ.clear_flag(.result)
 }