[Renaming] Handle error on RenameClassRector when method return static

[samsonasik]

@TomasVotruba given the following class:

class ReturnStaticDocCloneThis extends \DateTime
{
    /**
     * @return static
     */
    public function run(\DateTime $dateTime)
    {
        $obj = clone $this;
        return $obj;
    }
}

It cause error:

There was 1 error:

1) Rector\Tests\Renaming\Rector\Name\RenameClassRector\RenameClassRectorTest::test with data set #20 (Symplify\SmartFileSystem\SmartFileInfo Object (...))
TypeError: Rector\StaticTypeMapper\PhpDocParser\IdentifierTypeMapper::mapStatic(): Argument #1 ($scope) must be of type PHPStan\Analyser\Scope, null given, called in /Users/samsonasik/www/rector-src/packages/StaticTypeMapper/PhpDocParser/IdentifierTypeMapper.php on line 81

/Users/samsonasik/www/rector-src/packages/StaticTypeMapper/PhpDocParser/IdentifierTypeMapper.php:121
/Users/samsonasik/www/rector-src/packages/StaticTypeMapper/PhpDocParser/IdentifierTypeMapper.php:81

like in #1240

[samsonasik]

Fixed 🎉

[samsonasik]

All checks have passed 🎉 @TomasVotruba it is ready for review.

[TomasVotruba]

Thank you 👍