[vectorized](function) support array_first_index function (#18175)
mysql> select array_first_index(x->x+1>3, [2, 3, 4]);
+-------------------------------------------------------------------+
| array_first_index(array_map([x] -> x(0) + 1 > 3, ARRAY(2, 3, 4))) |
+-------------------------------------------------------------------+
| 2 |
+-------------------------------------------------------------------+
mysql> select array_first_index(x -> x is null, [null, 1, 2]);
+----------------------------------------------------------------------+
| array_first_index(array_map([x] -> x(0) IS NULL, ARRAY(NULL, 1, 2))) |
+----------------------------------------------------------------------+
| 1 |
+----------------------------------------------------------------------+
mysql> select array_first_index(x->power(x,2)>10, [1, 2, 3, 4]);
+---------------------------------------------------------------------------------+
| array_first_index(array_map([x] -> power(x(0), 2.0) > 10.0, ARRAY(1, 2, 3, 4))) |
+---------------------------------------------------------------------------------+
| 4 |
+---------------------------------------------------------------------------------+
20b3bdb000