Rpc: enable getConfirmedBlock and getConfirmedTransaction to return confirmed (not yet finalized) data (bp #16142) (#16160)

* Rpc: enable getConfirmedBlock and getConfirmedTransaction to return confirmed (not yet finalized) data (#16142)

* Add Blockstore block and tx apis that allow unrooted responses

* Add TransactionStatusMessage, and send on bank freeze; also refactor TransactionStatusSender

* Track highest slot with tx-status writes complete

* Rename and unpub fn

* Add commitment to GetConfirmed input configs

* Support confirmed blocks in getConfirmedBlock

* Support confirmed txs in getConfirmedTransaction

* Update sigs-for-addr2 comment

* Enable confirmed block in cli

* Enable confirmed transaction in cli

* Review comments

* Rename blockstore method

(cherry picked from commit 433f1ead1c)

# Conflicts:
#	core/src/replay_stage.rs

* Fix conflict

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

client/src/rpc_config.rs

@@ -135,6 +135,8 @@ pub struct RpcConfirmedBlockConfig {
     pub encoding: Option<UiTransactionEncoding>,
     pub transaction_details: Option<TransactionDetails>,
     pub rewards: Option<bool>,
+    #[serde(flatten)]
+    pub commitment: Option<CommitmentConfig>,
 }
 
 impl EncodingConfig for RpcConfirmedBlockConfig {
@@ -159,12 +161,15 @@ impl RpcConfirmedBlockConfig {
 #[serde(rename_all = "camelCase")]
 pub struct RpcConfirmedTransactionConfig {
     pub encoding: Option<UiTransactionEncoding>,
+    #[serde(flatten)]
+    pub commitment: Option<CommitmentConfig>,
 }
 
 impl EncodingConfig for RpcConfirmedTransactionConfig {
     fn new_with_encoding(encoding: &Option<UiTransactionEncoding>) -> Self {
         Self {
             encoding: *encoding,
+            ..Self::default()
         }
     }
 }