Remove reqwest re-exports from eth2 (#8829)

Remove `reqwest` from being re-exported within `eth2`


Co-Authored-By: Mac L <mjladson@pm.me>

validator_client/validator_services/Cargo.toml

@@ -13,6 +13,7 @@ futures = { workspace = true }
 graffiti_file = { workspace = true }
 logging = { workspace = true }
 parking_lot = { workspace = true }
+reqwest = { workspace = true }
 safe_arith = { workspace = true }
 slot_clock = { workspace = true }
 task_executor = { workspace = true }