Remove serde derive references (#4830)

* remove remaining uses of serde_derive

* fix lockfile

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Co-authored-by: João Oliveira <hello@jxs.pt>

testing/ef_tests/src/cases/fork.rs

@@ -2,7 +2,7 @@ use super::*;
 use crate::case_result::compare_beacon_state_results_without_caches;
 use crate::cases::common::previous_fork;
 use crate::decode::{ssz_decode_state, yaml_decode_file};
-use serde_derive::Deserialize;
+use serde::Deserialize;
 use state_processing::upgrade::{
     upgrade_to_altair, upgrade_to_bellatrix, upgrade_to_capella, upgrade_to_deneb,
 };