Add program and runtime support for Durable Transaction Nonces (#6845)

* Rework transaction processing result forwarding

Durable nonce prereq

* Add Durable Nonce program API

* Add runtime changes for Durable Nonce program

* Register Durable Nonce program

* Concise comments and bad math

* Fix c/p error

* Add rent sysvar to withdraw ix

* Remove rent exempt required balance from Meta struct

* Use the helper

sdk/src/sysvar/recent_blockhashes.rs

@@ -1,4 +1,9 @@
-use crate::{account::Account, hash::Hash, sysvar::Sysvar};
+use crate::{
+    account::Account,
+    hash::{hash, Hash},
+    sysvar::Sysvar,
+};
+use bincode::serialize;
 use std::collections::BinaryHeap;
 use std::iter::FromIterator;
 use std::ops::Deref;
@@ -69,6 +74,13 @@ where
     account
 }
 
+pub fn create_test_recent_blockhashes(start: usize) -> RecentBlockhashes {
+    let bhq: Vec<_> = (start..start + (MAX_ENTRIES - 1))
+        .map(|i| hash(&serialize(&i).unwrap()))
+        .collect();
+    RecentBlockhashes::from_iter(bhq.iter())
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;