[mlir] Implement `DataLayoutTypeInterface` for `LLVMArrayType`

Implementation of the interface allows querying the size and alignments of an LLVMArrayType as well as query the size and alignment of a struct containing an LLVMArrayType.
The implementation should yield the same results as llvm::DataLayout, including support for over aligned element types.
There is no customization point for adjusting an arrays alignment; it is simply taken from the element type.

Differential Revision: https://reviews.llvm.org/D115704