Add poh speed check and tick speed calibration (#14292)

validator/src/main.rs

@@ -1104,6 +1104,11 @@ pub fn main() {
                 .default_value("10000")
                 .help("Milliseconds between printing contact debug from gossip."),
         )
+        .arg(
+            Arg::with_name("no_poh_speed_test")
+                .long("no-poh-speed-test")
+                .help("Skip the check for PoH speed."),
+        )
         .arg(
             Arg::with_name("accounts_hash_interval_slots")
                 .long("accounts-hash-slots")
@@ -1544,6 +1549,7 @@ pub fn main() {
             "rpc_send_transaction_leader_forward_count",
             u64
         ),
+        no_poh_speed_test: matches.is_present("no_poh_speed_test"),
         ..ValidatorConfig::default()
     };