Revert signature-notification format change (bp #12032) (#12038)

* Revert signature-notification format change (#12032)

* Use untagged RpcSignatureResult enum to avoid breaking downstream consumers of current signature subscriptions

* Clean up client duplication

* Clippy

(cherry picked from commit 39246f9dd7)

# Conflicts:
#	core/src/rpc_pubsub.rs

* Fix conflicts

Co-authored-by: Tyera Eulberg <teulberg@gmail.com>
Co-authored-by: Tyera Eulberg <tyera@solana.com>

core/tests/client.rs

@@ -1,7 +1,4 @@
-use solana_client::{
-    pubsub_client::{PubsubClient, SlotInfoMessage},
-    rpc_client::RpcClient,
-};
+use solana_client::{pubsub_client::PubsubClient, rpc_client::RpcClient, rpc_response::SlotInfo};
 use solana_core::{
     rpc_pubsub_service::PubSubService, rpc_subscriptions::RpcSubscriptions,
     validator::TestValidator,
@@ -105,7 +102,7 @@ fn test_slot_subscription() {
     let (mut client, receiver) =
         PubsubClient::slot_subscribe(&format!("ws://0.0.0.0:{}/", pubsub_addr.port())).unwrap();
 
-    let mut errors: Vec<(SlotInfoMessage, SlotInfoMessage)> = Vec::new();
+    let mut errors: Vec<(SlotInfo, SlotInfo)> = Vec::new();
 
     for i in 0..3 {
         subscriptions.notify_slot(i + 1, i, i);
@@ -114,7 +111,7 @@ fn test_slot_subscription() {
 
         match maybe_actual {
             Ok(actual) => {
-                let expected = SlotInfoMessage {
+                let expected = SlotInfo {
                     slot: i + 1,
                     parent: i,
                     root: i,

core/tests/rpc.rs

@@ -285,7 +285,7 @@ fn test_rpc_subscriptions() {
         let timeout = deadline.saturating_duration_since(Instant::now());
         match status_receiver.recv_timeout(timeout) {
             Ok((sig, result)) => {
-                if let RpcSignatureResult::ProcessedSignatureResult(result) = result.value {
+                if let RpcSignatureResult::ProcessedSignature(result) = result.value {
                     assert!(result.err.is_none());
                     assert!(signature_set.remove(&sig));
                 } else {