PHPStan: re-enable `bleedingEdge` option #5753

Job	Run time
PHP 8.1 - WP latest	3m 28s
PHP 8.0 - WP latest	3m 40s
PHP 8.2 - WP latest (with coverage)	7m 18s
PHP 7.4 - WP 6.4	3m 46s
PHP 8.2 - WP latest (experimental) (in random order)	2m 43s
PHP 8.3 - WP trunk (experimental)	3m 42s
PHP 8.4 - WP trunk (experimental)	3m 42s
	28m 19s

Provide feedback