[mono] Fix swift struct lowering support for `InlineArray`

[jkurdek]

#99439 added the struct lowering algorithm in mono type system. This change has included lowering support for structs with InlineArray attribute. However, attempting to run the struct lowering algorithm on such a struct results in a runtime crash. We should investigate and fix this problem in mono.

E.g. this should be lowered correctly.

[System.Runtime.CompilerServices.InlineArray(16)]
public struct Data
{
    private byte payload;
}

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