Use Find-2.0 API of MIOpen for the MIOpen fusions

[umangyadav]

Currently, MIGraphX only uses Find-2.0 API of the MIOpen for the "Convolution" operators.

One of the key optimization of the MIGraphX is the Fusion and for that it makes use of the MIOpen fusion APIs.

For the YModel feature, we would like to store the kernel perf configurations for the Fused operators inside the "mxr" file. MIOpen has API to support that now.

Goal is: if the UserPerfDB has no values for any of the fused plans, then also by making use of the saved tuned parameters inside "mxr" file, MIGraphX should be able to achieve the same performance as opposed to picking Default/Heuristic values for those configs.