Updated Halide schedule to use circular buffer optimization

[skeqiqevian]

In order to make the circular buffer optimization work, I had to modify compute_at_with_prologue. This is due to our limited range analysis being insufficient to reason about for loops with an i == 0 clause in the body, so I commented out the code which fuses the prologue into the main loop body.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 87.00%. Comparing base (7c07329) to head (64abae4).

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #629 +/- ## ======================================= Coverage 87.00% 87.00% ======================================= Files 94 94 Lines 21816 21814 -2 ======================================= - Hits 18980 18979 -1 + Misses 2836 2835 -1 ```

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