PHPStan ArrayHandler::getCallableDependencies() guard leaks in method bodies, functions, param defaults, and closures, reflecting full classes on 2-element string arrays

[alfredbez]

In ArrayHandler::getCallableDependencies(), the guard introduced in PR #6559 only skips class-level scopes ($scope->getFunction() === null). In method bodies, functions, parameter defaults, and closures, any 2-element array literal ['SomeClass', 'string_literal'] whose first element resolves to an existing class name triggers ConstantArrayType::isCallable(). This calls hasMethod() and reflects the entire class into memory, causing large memory spikes for monolithic classes.

Reproducer

class BigContainer
{
}

class Service
{
    public function check(string $item): bool
    {
        $modes = ['BigContainer', 'packstation'];
        return in_array($item, $modes, true);
    }
}

Expected Behavior

Two-element array literals whose first element is a plain string scalar or not currently within a function call should not reflect the named class as a callable. getCallableDependencies() should only collect callable dependencies when an active function call is in progress and the first element is an explicit ClassConstFetch (Foo::class).