Rename allocation_bounds to allocation_extents.
Rename allocation_bounds to allocation_extents.


Former-commit-id: f630fd5aaca3d2701d3ae4be39d3c101b1e418be [formerly 99974090f50b2ba365da81635378f6ef9b7135a8]
Former-commit-id: a6a65c9b4c6c6943ecbf135e16ed188068e244a3
darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide