Cli: deploy programs via TPU (#13090)

* Deploy: send write transactions to leader tpu

* Less apparent stalling during confirmation

* Add EpochInfo mock

* Only get cluster nodes once

* Send deploy writes to next leader

cli/src/send_tpu.rs

@@ -0,0 +1,29 @@
+use log::*;
+use solana_client::rpc_response::{RpcContactInfo, RpcLeaderSchedule};
+use std::net::{SocketAddr, UdpSocket};
+
+pub fn get_leader_tpu(
+    slot_index: u64,
+    leader_schedule: Option<&RpcLeaderSchedule>,
+    cluster_nodes: Option<&Vec<RpcContactInfo>>,
+) -> Option<SocketAddr> {
+    leader_schedule?
+        .iter()
+        .find(|(_pubkey, slots)| slots.iter().any(|slot| *slot as u64 == slot_index))
+        .and_then(|(pubkey, _)| {
+            cluster_nodes?
+                .iter()
+                .find(|contact_info| contact_info.pubkey == *pubkey)
+                .and_then(|contact_info| contact_info.tpu)
+        })
+}
+
+pub fn send_transaction_tpu(
+    send_socket: &UdpSocket,
+    tpu_address: &SocketAddr,
+    wire_transaction: &[u8],
+) {
+    if let Err(err) = send_socket.send_to(wire_transaction, tpu_address) {
+        warn!("Failed to send transaction to {}: {:?}", tpu_address, err);
+    }
+}