fix(primitives): reduce cid feature set

WASM compilation of primitives was broken because we didn't depent on alloc.
This was not noticeable anywhere else because of cargo's feature unification,
when building the pallets, we depended directly on cid with the alloc feature,
as such, when primitives was built, it already had the alloc feature.

primitives/Cargo.toml

@@ -8,7 +8,7 @@ repository.workspace = true
 version = "0.1.0"
 
 [dependencies]
-cid = { workspace = true }
+cid = { workspace = true, default-features = false, features = ["alloc"] }
 clap = { workspace = true, features = ["derive"], optional = true }
 codec = { workspace = true, features = ["derive"] }
 filecoin-proofs = { workspace = true, optional = true }