Use rooted bank by default in rpc bank selection (#6759)

* Name anonymous parameters for clarity

* Add CommitmentConfig to select bank for rpc

* Add commitment information to jsonrpc docs

* Update send_and_confirm retries as per commitment defaults

* Pass CommitmentConfig into client requests; also various 'use' cleanup

* Use _with_commitment methods to speed local_cluster tests

* Pass CommitmentConfig into Archiver in order to enable quick confirmations in local_cluster tests

* Restore solana ping speed

* Increase wallet-sanity timeout to account for longer confirmation time

client/src/perf_utils.rs

@@ -1,10 +1,13 @@
 use log::*;
-use solana_sdk::client::Client;
-use solana_sdk::timing::duration_as_s;
-use std::sync::atomic::{AtomicBool, Ordering};
-use std::sync::{Arc, RwLock};
-use std::thread::sleep;
-use std::time::{Duration, Instant};
+use solana_sdk::{client::Client, commitment_config::CommitmentConfig, timing::duration_as_s};
+use std::{
+    sync::{
+        atomic::{AtomicBool, Ordering},
+        Arc, RwLock,
+    },
+    thread::sleep,
+    time::{Duration, Instant},
+};
 
 #[derive(Default)]
 pub struct SampleStats {
@@ -29,7 +32,9 @@ pub fn sample_txs<T>(
     let mut total_txs;
     let mut now = Instant::now();
     let start_time = now;
-    let initial_txs = client.get_transaction_count().expect("transaction count");
+    let initial_txs = client
+        .get_transaction_count_with_commitment(CommitmentConfig::recent())
+        .expect("transaction count");
     let mut last_txs = initial_txs;
 
     loop {
@@ -37,7 +42,7 @@ pub fn sample_txs<T>(
         let elapsed = now.elapsed();
         now = Instant::now();
         let mut txs;
-        match client.get_transaction_count() {
+        match client.get_transaction_count_with_commitment(CommitmentConfig::recent()) {
             Err(e) => {
                 // ThinClient with multiple options should pick a better one now.
                 info!("Couldn't get transaction count {:?}", e);