allow short closure to return never

[orklah]

This will fix #7323

There was 2 bugs:

• Psalm emitted a NoValue when a never returning statement was in the closure. This is due to short closure performing a return implicitly. The ReturnAnalyzer make sure to emit a NoValue when returning a Never. I fixed this by suppressing NoValue in the context of a short closure. It's not the most direct way but I couldn't see how to pass the info that I was in a short closure to the ReturnAnalyzer. Even a flag in Context would have been weird because they seem to be nestable.
• Kinda similarly, whenever there is a return in a functionlike scope and the functionlike declare returning void or never, an InvalidReturnStatement is emitted. I solved that by making sure a return (never) is seen as an exit instead of being seen as a return.

[orklah]

I'm putting this on hold until we have a response to php/php-src#7900. The change I made is compatible whether this is fixed or not, but I added a comment that would loose relevance if this is fixed

[orklah]

I'll merge this as-is, the issue on php-src has been flagged as "feature"