Fix InteractsWithTwigComponents not being able to render blocks when variable scope is limited (cache friendlier solution with limitations)

[janopae]

Q	A
Bug fix?	yes
New feature?	no
Deprecations?	no
Documentation?	no
Issues	Fix #3210
License	MIT

Alternative to https://github.com/symfony/ux/pull/3211 which should be more cache-friendly. Has the limitation that it requires components to allow the outerScope variable in blocks they define.

[smnandre]

This is problematic to me, as using outerScope really does change the runtime code and makes it in my eyes too different of what would happen in production. Also at best it would not bring added value for most users.. at worst it could be causing problems with outerScope or any change we do around its implementation.

I'm pretty sure we can find a way to help you in that very specific need without impacting every other tests out there ..