Add msg! macro for program logging, deprecate info! macro (#13885)

(cherry picked from commit 6705b5a98c)

Co-authored-by: Michael Vines <mvines@gmail.com>

programs/bpf/rust/rand/src/lib.rs

@@ -4,7 +4,7 @@
 
 extern crate solana_program;
 use solana_program::{
-    account_info::AccountInfo, entrypoint, entrypoint::ProgramResult, info, pubkey::Pubkey,
+    account_info::AccountInfo, entrypoint, entrypoint::ProgramResult, msg, pubkey::Pubkey,
 };
 
 entrypoint!(process_instruction);
@@ -13,6 +13,6 @@ fn process_instruction(
     _accounts: &[AccountInfo],
     _instruction_data: &[u8],
 ) -> ProgramResult {
-    info!("rand");
+    msg!("rand");
     Ok(())
 }