[mlir][Linalg] Tile sizes for Conv ops vectorization added as pass arguments

[mlir][Linalg] Tile sizes for Conv ops vectorization added as pass arguments

Current setup for conv op vectorization does not enable user to specify tile
sizes as well as dimensions for vectorization. In this commit we change that by
adding tile sizes as pass arguments. Every dimension with corresponding tile
size > 1 is automatically vectorized.

Differential Revision: https://reviews.llvm.org/D88533