Refactor: Merge MessageProcessor into InvokeContext (#20165)

* Inlines MessageProcessor::execute_instruction() in MessageProcessor::process_message().

* Moves MessageProcessor::create_pre_accounts() into ThisInvokeContext::push().

* Hoists ThisInvokeContext::new() out of loop inside MessageProcessor::process_message().

* Moves MessageProcessor::verify_account_references() and MessageProcessor::verify() into InvokeContext::verify().

program-runtime/src/instruction_processor.rs

@@ -584,7 +584,7 @@ impl InstructionProcessor {
             message,
             instruction,
             program_indices,
-            account_indices,
+            Some(account_indices),
         )?;
 
         let mut instruction_processor = InstructionProcessor::default();