Fix Uncache viewhelper outside of extbase

[Ceremony64]

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Fixes #1894 and a Typo3 v10 regression that came with the release of 7.0.0

[linawolf]

Fixes errors in our TYPO3 v12 projec. @NamelessCoder It would be great if this could be merged

[NamelessCoder]

Thanks for the pull request! However, as you can see from the PHPStan reported problems, changing the request resolving method reveals several other ViewHelpers which would not be compatible with a returned ServerRequest.

So I rolled all of that into a combined fix which fixes this particular error plus all potential errors coming from use outside of an Extbase context.

See https://github.com/FluidTYPO3/vhs/commit/28768f313cf4c853aa08fca8b85dbe4b2d9e66d1.