CLI: dynamic signing reboot (#8384)

* Add keypair_util_from_path helper

* Cli: impl config.keypair as a trait object

* SDK: Add Debug and PartialEq for dyn Signer

* ClapUtils: Arg parsing from pubkey+signers to Presigner

* Impl Signers for &dyn Signer collections

* CLI: Add helper for getting signers from args

* CLI: Replace SigningAuthority with Signer trait-objs

* CLI: Drop disused signers command field

* CLI: Drop redundant tests

* Add clap validator that handles all current signer types

* clap_utils: Factor Presigner resolution to helper

* SDK: `From` for boxing Signer implementors to trait objects

* SDK: Derive `Clone` for `Presigner`

* Remove panic

* Cli: dedup signers in transfer for remote-wallet ergonomics

* Update docs vis-a-vis ASK changes

* Cli: update transaction types to use new dynamic-signer methods

* CLI: Fix tests No. 1

what to do about write_keypair outstanding

* Work around `CliConfig`'s signer not necessarily being a `Keypair`

* CLI: Fix tests No. 2

* Remove unused arg

* Remove unused methods

* Move offline arg constants upstream

* Make cli signing fallible

Co-authored-by: Trent Nelson <trent.a.b.nelson@gmail.com>

cli/src/cluster_query.rs

@@ -20,9 +20,11 @@ use solana_sdk::{
     commitment_config::CommitmentConfig,
     epoch_schedule::Epoch,
     hash::Hash,
+    message::Message,
     pubkey::Pubkey,
     signature::{Keypair, Signer},
-    system_transaction,
+    system_instruction,
+    transaction::Transaction,
 };
 use std::{
     collections::{HashMap, VecDeque},
@@ -743,8 +745,10 @@ pub fn process_ping(
         let (recent_blockhash, fee_calculator) = rpc_client.get_new_blockhash(&last_blockhash)?;
         last_blockhash = recent_blockhash;
 
-        let transaction =
-            system_transaction::transfer(&config.keypair, &to, lamports, recent_blockhash);
+        let ix = system_instruction::transfer(&config.keypair.pubkey(), &to, lamports);
+        let message = Message::new(vec![ix]);
+        let mut transaction = Transaction::new_unsigned(message);
+        transaction.try_sign(&[config.keypair.as_ref()], recent_blockhash)?;
         check_account_for_fee(
             rpc_client,
             &config.keypair.pubkey(),