[mlir][tensor] Remove folding of tensor.extract_slice during tiling

Blindly folding tensor.extract_slice makes the bufferization
transformation harder. This kind of transformation should happen
separatley if needed rather than doing it within makeShape that is
called during tiling.
Also removed makeComposedExtractSliceOp as it is not tested outside of
this code.

Differential Revision: https://reviews.llvm.org/D132666