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/handle_rpc.rs

@@ -57,7 +57,7 @@ pub async fn handle_rpc<T: EthSpec>(
         ENGINE_EXECUTE_PAYLOAD_V1 => {
             let request: JsonExecutionPayloadV1<T> = get_param(params, 0)?;
 
-            let response = if let Some(status) = *ctx.static_execute_payload_response.lock() {
+            let response = if let Some(status) = *ctx.static_notify_new_payload_response.lock() {
                 match status {
                     ExecutePayloadResponseStatus::Valid => ExecutePayloadResponse {
                         status,
@@ -74,7 +74,7 @@ pub async fn handle_rpc<T: EthSpec>(
             } else {
                 ctx.execution_block_generator
                     .write()
-                    .execute_payload(request.into())
+                    .notify_new_payload(request.into())
             };
 
             Ok(serde_json::to_value(JsonExecutePayloadV1Response::from(response)).unwrap())