[StimulusBundle/TwigComponent] Fix "use_yield" to "true" deprecation notice in CI

[evertharmeling]

Q	A
Bug fix?	yes
New feature?	no
Issues
License	MIT

Only this one remains (in StimulusBundle), but I can't find a direct implementation related to the Environment in that test. Maybe also related to symfony/symfony#53805 or thoughts anyone?

1x: Since twig/twig 3.9.0: Not setting "use_yield" to "true" is deprecated.
    1x in StimulusControllerLoaderFunctionalTest::testFullApplicationLoad from Symfony\UX\StimulusBundle\Tests\AssetMapper

[weaverryan]

Thanks @evertharmeling! We'll keep debugging the rest after this. For the TwigComponents deprecation, more work is needed - and I know that Simon has looked into it #1390 (comment)

[weaverryan]

Thanks Evert!