fix #22406 - [REG 2.112] Error: function '_d_aaLen' is not callable …

[rainers]

…using argument types '(shared(int[int]))'

add shared overloads for _d_aaLen and _d_aaIn.

[dlang-bot]

Thanks for your pull request, @rainers!

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Testing this PR locally

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dub run digger -- build "stable + dmd#22407"