ext/standard: update array_filter $mode param default value to ARRAY_FILTER_USE_VALUE

In GH-15647, the `array_filter` function was changed to throw a
`ValueError` exception when the `$mode` parameter receives an
invalid.

Additionally, it declares a new `ARRAY_FILTER_USE_VALUE`, assigned
(`int 1`) to it.

This changes the default value of the `array_filter` function's
`$mode` parameter to use the new constant, changing it from
`int $mode = 0` to `int $mode = ARRAY_FILTER_USE_KEY)`.

Author: Ayesh

ext/standard/basic_functions.stub.php

@@ -1871,7 +1871,7 @@ function array_product(array $array): int|float {}
 
 function array_reduce(array $array, callable $callback, mixed $initial = null): mixed {}
 
-function array_filter(array $array, ?callable $callback = null, int $mode = 0): array {}
+function array_filter(array $array, ?callable $callback = null, int $mode = ARRAY_FILTER_USE_KEY): array {}
 
 function array_find(array $array, callable $callback): mixed {}