[mlir][linalg] Fusion on tensors.

[mlir][linalg] Fusion on tensors.

Add a new version of fusion on tensors that supports the following scenarios:
- support input and output operand fusion
- fuse a producer result passed in via tile loop iteration arguments (update the tile loop iteration arguments)
- supports only linalg operations on tensors
- supports only scf::for
- cannot add an output to the tile loop nest

The LinalgTileAndFuseOnTensors pass tiles the root operation and fuses its producers.

Reviewed By: nicolasvasilache, mravishankar

Differential Revision: https://reviews.llvm.org/D109766