TASK: Remove deprecated Fusion prototypes

[mficzel]

Subtask of #4498

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Description

The prototypes "Array", "RawArray", "Collection", "RawCollection" and "Attributes" are deprecated since at least Neos 5 and should be removed.

Possible Solution

No response

[mhsdesign]

Hheheh i found some old fusion inside the neos ui e2e tests which needs to be adjusted ^^ https://github.com/neos/neos-ui/tree/9.0/Tests/IntegrationTests/TestDistribution/DistributionPackages

[bwaidelich]

@mficzel Thanks again for your great efforts on this one, it feels much cleaner.

I stumbled upon a regression though: Fluid based prototypes that used Attributes now fail with a "Array to string conversion" exception (see Slack discussion).

IMO there are four possible solutions:

a) re-add Neos.Fusion:Attributes and use it for all Fluid based prototypes
b) adjust affected prototypes with some @process magic that converts the arrays
c) replace Prototypes using Fluid with Fusion implementations and remove Fluid dependency from Neos.Fusion
d) adjust affected Fluid templates, e.g. by adding a dedicated AttributesViewHelper