[mlir][tensor] Support more cases in MergeConsecutiveExtractSlice

This commit adds utility functions to perform general merging of
OffsetSizeAndStrideOpInterface by supporting producer rank
reducing and non-unit strides.

With it we can extend MergeConsecutiveExtractSlice to support
more cases.

Co-authored-by: Mahesh Ravishankar <ravishankarm@google.com>

Reviewed By: ThomasRaoux

Differential Revision: https://reviews.llvm.org/D134294