Add snapshot hash of full accounts state (#8295) (#8515)

* Add snapshot hash of full accounts state

* Use normal hashing for the accounts delta state

* Add merkle

(cherry picked from commit 947a339714)

Co-authored-by: sakridge <sakridge@gmail.com>

sdk/src/lib.rs

@@ -64,8 +64,6 @@ pub mod program_error;
 
 // Modules not usable by on-chain programs
 #[cfg(not(feature = "program"))]
-pub mod bank_hash;
-#[cfg(not(feature = "program"))]
 pub mod client;
 #[cfg(not(feature = "program"))]
 pub mod genesis_config;