use Account for test since it borrows mut ref to data (#15852)

program-test/src/lib.rs

@@ -111,9 +111,14 @@ pub fn builtin_process_instruction(
     set_invoke_context(invoke_context);
 
     // Copy all the accounts into a HashMap to ensure there are no duplicates
-    let mut accounts: HashMap<Pubkey, AccountSharedData> = keyed_accounts
+    let mut accounts: HashMap<Pubkey, Account> = keyed_accounts
         .iter()
-        .map(|ka| (*ka.unsigned_key(), ka.account.borrow().clone()))
+        .map(|ka| {
+            (
+                *ka.unsigned_key(),
+                Account::from(ka.account.borrow().clone()),
+            )
+        })
         .collect();
 
     // Create shared references to each account's lamports/data/owner