[php-src] PR #25436: SCCP: Fold array_key_exists() with boolean and integral float keys

Pull Request: https://github.com/php/php-src/pull/25436 Author: LamentXU123 We can remove the extra key-type restriction in ct_eval_array_key_exists() to allow SCCP to fold calls with boolean and integral float keys This is safe because fetch_array_elem() https://github.com/php/php-src/blob/d1ec606d13d4ca2f17a433de0d47e1c4342eefd0/Zend/Optimizer/sccp.c#L361-L388 already implements the required conversions. for example: ``` function test() { return array_key_exists(1.0, [1 => null]); } ``` before ``` 0000 T0 = ARRAY_KEY_EXISTS float(1) array(...) 0001 RETURN T0 ``` after ``` 0000 RETURN bool(true) ```