Update Rust Edition to 2024 (#7766)

* #7749

Thanks @dknopik and @michaelsproul for your help!

beacon_node/execution_layer/src/test_utils/mock_builder.rs

@@ -7,8 +7,8 @@ use eth2::types::{
     ProposerData, StateId, ValidatorId,
 };
 use eth2::{
-    BeaconNodeHttpClient, Timeouts, CONSENSUS_VERSION_HEADER, CONTENT_TYPE_HEADER,
-    SSZ_CONTENT_TYPE_HEADER,
+    BeaconNodeHttpClient, CONSENSUS_VERSION_HEADER, CONTENT_TYPE_HEADER, SSZ_CONTENT_TYPE_HEADER,
+    Timeouts,
 };
 use fork_choice::ForkchoiceUpdateParameters;
 use parking_lot::RwLock;