Bump to PHPStan 2.1.34 and fix compatible code

[samsonasik]

the change:

• no longer exists PHPStan VariadicFunctionsVisitor and VariadicMethodsVisitor
• new Scope named PHPStan\Analyser\Fiber\FiberScope, need to be converted to:

if ($scope instanceof \PHPStan\Analyser\Fiber\FiberScope) {
     $scope = $scope->toMutatingScope();
}

on PHPStanNodeScopeResolver and on use of $scope->getParentScope()

• OptimizedSingleFileSourceLocator need to be created via OptimizedSingleFileSourceLocatorRepository

Fixes rectorphp/rector#9604

[samsonasik]

@TomasVotruba it seems there is error on ContainerMemento after update to PHPStan 2.1.34

PHP Warning: Undefined array key 0 in /home/runner/work/rector-src/rector-src/src/DependencyInjection/PHPStan/PHPStanContainerMemento.php on line 44

see https://github.com/rectorphp/rector-src/actions/runs/21150186226/job/60824424332?pr=7844#step:8:10

[samsonasik]

@TomasVotruba ready for merge 👍 the notice on rector-laravel test and rector/rector-compat-tests compat on other repo need merge and new release first :)

[MGatner]

LGTM!

[TomasVotruba]

LGTM 👌

[samsonasik]

Released immediate rector 2.3.2 for it :) https://github.com/rectorphp/rector/releases/tag/2.3.2