Fix DIP1000 scope array of arrays comparison

[Albert24GG]

This PR fixes #21945. The issue was that __equals accepted only dynamic array/slice arguments, so calling it with static arrays caused an explicit cast to slice, which in turn triggered some error in the escape checking logic.

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Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + dmd#21947"

[thewilsonator]

any idea what is causing CI to fail?

[Albert24GG]

I managed to fix the issue by explicitly handling static arrays through override functions. I am not sure why that test was previously failing only on windows,

[dkorpel]

Thanks for fixing this so quickly!