Support 2D inner reduction scheduler with autotuning (#3456)

# Summary:
This PR creates an SOL autotuning script for the 2d inner reduction
scheduler. It trains a random forest to predict the best performing
configuration for the reduction scheduler.

# Inner Reduction Fusions:
1. Sum --- `y = sum(x, dim=-1)`
2. Add Sum --- `z = sum(x1 + x2 + x3 + x4, dim=-1)`
3. Tanh Sum --- `y = sum(tanh(x), dim=-1)`
4. Exp Sum --- `z = sum(exp(x), dim=-1)`