Rename solana-wallet program to just solana (#5604)

* Rename wallet/ to cli/

* Rename the solana-wallet crate to solana-cli

* Rename solana-wallet program to solana

* cargo fmt

multinode-demo/validator.sh

@@ -237,7 +237,7 @@ trap 'kill_node_and_exit' INT TERM ERR
 wallet() {
   (
     set -x
-    $solana_wallet --keypair "$identity_keypair_path" --url "$rpc_url" "$@"
+    $solana_cli --keypair "$identity_keypair_path" --url "$rpc_url" "$@"
   )
 }