perf: and fix, avoid calling get_test_account

Author: antazoey

src/ape/managers/accounts.py

@@ -82,13 +82,12 @@ def __getitem__(self, account_id):
 
     @__getitem__.register
     def __getitem_int(self, account_id: int):
-        if account_id in self._accounts_by_index:
-            return self._accounts_by_index[account_id]
-
-        original_account_id = account_id
         if account_id < 0:
             account_id = len(self) + account_id
 
+        if account_id in self._accounts_by_index:
+            return self._accounts_by_index[account_id]
+
         account = self.containers["test"].get_test_account(account_id)
         self._accounts_by_index[original_account_id] = account
         return account