memref: Missing reinterpret_cast

[zero9178]

See https://mlir.llvm.org/docs/Dialects/MemRef/#memrefreinterpret_cast-memrefreinterpretcastop

This operation is useful for many reasons with one use-case being passing memrefs across function calls. By combining it with barepointer calling convention, one can choose how the base pointer and the various metadata of a memref are passed to functions.