Use constexpr to perform load replacement

[wsmoses]

No description provided.

[github-actions]

Benchmark Results

	main	51c141a...	main / 51c141a...
basics/make_zero/namedtuple	0.0568 ± 0.0026 μs	0.0549 ± 0.0026 μs	1.03 ± 0.069
basics/make_zero/struct	0.265 ± 0.0076 μs	0.267 ± 0.0083 μs	0.991 ± 0.042
basics/overhead	4.33 ± 0.01 ns	4.95 ± 0.011 ns	0.875 ± 0.0028
basics/remake_zero!/namedtuple	0.227 ± 0.012 μs	0.229 ± 0.013 μs	0.99 ± 0.078
basics/remake_zero!/struct	0.225 ± 0.014 μs	0.224 ± 0.015 μs	1 ± 0.092
fold_broadcast/multidim_sum_bcast/1D	10.2 ± 0.24 μs	10.2 ± 0.45 μs	0.997 ± 0.05
fold_broadcast/multidim_sum_bcast/2D	12 ± 0.3 μs	12 ± 0.31 μs	0.997 ± 0.036
time_to_load	1.53 ± 0.0095 s	1.55 ± 0.01 s	0.987 ± 0.0089

Benchmark Plots

A plot of the benchmark results has been uploaded as an artifact at https://github.com/EnzymeAD/Enzyme.jl/actions/runs/29058415937/artifacts/8214635454.