Standard Liveness Endpoint (#4853)

* Changes to use required Endpoint

* Format

* fixed doppleganger service

* minor fix

* efficiency changes

* fixed tests

* remove commented line

---------

Co-authored-by: Jimmy Chen <jchen.tc@gmail.com>

common/eth2/src/lib.rs

@@ -2145,7 +2145,7 @@ impl BeaconNodeHttpClient {
     pub async fn post_validator_liveness_epoch(
         &self,
         epoch: Epoch,
-        indices: Vec<u64>,
+        indices: &Vec<u64>,
     ) -> Result<GenericResponse<Vec<StandardLivenessResponseData>>, Error> {
         let mut path = self.eth_path(V1)?;
 
@@ -2155,7 +2155,7 @@ impl BeaconNodeHttpClient {
             .push("liveness")
             .push(&epoch.to_string());
 
-        self.post_with_timeout_and_response(path, &indices, self.timeouts.liveness)
+        self.post_with_timeout_and_response(path, indices, self.timeouts.liveness)
             .await
     }