Update to consensus-specs v1.1.9 (#3016)

## Issue Addressed

Closes #3014

## Proposed Changes

- Rename `receipt_root` to `receipts_root`
- Rename `execute_payload` to `notify_new_payload`
   - This is slightly weird since we modify everything except the actual HTTP call to the engine API. That change is expected to be implemented in #2985 (cc @ethDreamer)
- Enable "random" tests for Bellatrix.

## Notes

This will break *partially* compatibility with Kintusgi testnets in order to gain compatibility with [Kiln](https://hackmd.io/@n0ble/kiln-spec) testnets. I think it will only break the BN APIs due to the `receipts_root` change, however it might have some other effects too.

Co-authored-by: Michael Sproul <micsproul@gmail.com>

beacon_node/execution_layer/src/test_utils/mod.rs

@@ -62,7 +62,7 @@ impl<T: EthSpec> MockServer<T> {
             last_echo_request: last_echo_request.clone(),
             execution_block_generator: RwLock::new(execution_block_generator),
             preloaded_responses,
-            static_execute_payload_response: <_>::default(),
+            static_notify_new_payload_response: <_>::default(),
             _phantom: PhantomData,
         });
 
@@ -117,7 +117,8 @@ impl<T: EthSpec> MockServer<T> {
     }
 
     pub fn all_payloads_valid(&self) {
-        *self.ctx.static_execute_payload_response.lock() = Some(ExecutePayloadResponseStatus::Valid)
+        *self.ctx.static_notify_new_payload_response.lock() =
+            Some(ExecutePayloadResponseStatus::Valid)
     }
 
     pub fn insert_pow_block(
@@ -187,7 +188,7 @@ pub struct Context<T: EthSpec> {
     pub last_echo_request: Arc<RwLock<Option<Bytes>>>,
     pub execution_block_generator: RwLock<ExecutionBlockGenerator<T>>,
     pub preloaded_responses: Arc<Mutex<Vec<serde_json::Value>>>,
-    pub static_execute_payload_response: Arc<Mutex<Option<ExecutePayloadResponseStatus>>>,
+    pub static_notify_new_payload_response: Arc<Mutex<Option<ExecutePayloadResponseStatus>>>,
     pub _phantom: PhantomData<T>,
 }