[DowngradePhp82] Add DowngradeReflectionMethodHasPrototypeRector

[roxblnfk]

🔍 What was changed

New DowngradeReflectionMethodHasPrototypeRector (PHP 8.2 → 8.1) that rewrites $reflectionMethod->hasPrototype() into an emulation based on getPrototype().

$reflectionMethod->hasPrototype() becomes:

(function (\ReflectionMethod $reflectionMethod): bool {
    try {
        $reflectionMethod->getPrototype();
        return true;
    } catch (\ReflectionException) {
        return false;
    }
})($reflectionMethod)

The rule bails out on first-class callables, on non-ReflectionMethod receivers, and on any other method name.

Why?

ReflectionMethod::hasPrototype() was added in PHP 8.2 and does not exist below it, so the usual method_exists() ternary idiom used by other reflection downgrade rules would always evaluate to false — semantically wrong. getPrototype() (available long before) throws ReflectionException exactly when there is no prototype, which is precisely what hasPrototype() reports, so it is a faithful substitute.

The result must be usable in any expression context (if (...), assignment, argument), but try/catch is a statement — hence the immediately invoked closure. The receiver is passed as an argument instead of captured via use, so a complex receiver expression keeps working without a separate variable.

Chained downgrades below 8.0 are already covered: the emitted non-capturing catch (\ReflectionException) is lowered by the existing DowngradeNonCapturingCatchesRector.

Checklist

• How was this tested:
  • Unit tests added

Fixtures cover the plain return case, the if ($m->hasPrototype()) { $m = $m->getPrototype(); } pattern, and two skip cases (non-ReflectionMethod receiver, first-class callable). Locally green: PHPUnit, PHPStan, ECS, rector process --dry-run, class-leak.