`simd: apply packing for tree leaves #5` breaks Ream's zkVM compatibility with SP1/Risc0

[KolbyML]

This PR breaks our compatibility with SP1 and RISCV0 #5

error[E0658]: const arguments cannot yet be inferred with `_`
   --> /home/kolby/.cargo/git/checkouts/leansig-eb6084e1fc0dad4d/ceefed3/src/symmetric/tweak_hash/poseidon.rs:536:67
    |
536 |                 let packed_leaves = poseidon_sponge::<PackedF, _, _, _>(
    |                                                                   ^
    |
    = note: see issue #85077 <https://github.com/rust-lang/rust/issues/85077> for more information
    = help: add `#![feature(generic_arg_infer)]` to the crate attributes to enable

error[E0658]: const arguments cannot yet be inferred with `_`
   --> /home/kolby/.cargo/git/checkouts/leansig-eb6084e1fc0dad4d/ceefed3/src/symmetric/tweak_hash/poseidon.rs:536:70
    |
536 |                 let packed_leaves = poseidon_sponge::<PackedF, _, _, _>(
    |                                                                      ^
    |
    = note: see issue #85077 <https://github.com/rust-lang/rust/issues/85077> for more information
    = help: add `#![feature(generic_arg_infer)]` to the crate attributes to enable

I get this error whenever I compile with either toolchain