feat: add 'group created instructions' as info message (#4916)

Before, it was shown by UI when the chat is empty, however, in case of
verified groups, this is never the case any longer as the 'e2ee now
guaranteed' is always added.

python/tests/test_3_offline.py

@@ -5,8 +5,6 @@ from datetime import datetime, timedelta, timezone
 import pytest
 
 import deltachat as dc
-from deltachat.capi import ffi, lib
-from deltachat.cutil import iter_array
 from deltachat.tracker import ImexFailed
 from deltachat import Account, account_hookimpl, Message
 
@@ -802,6 +800,7 @@ class TestOfflineChat:
     def test_audit_log_view_without_daymarker(self, ac1, lp):
         lp.sec("ac1: test audit log (show only system messages)")
         chat = ac1.create_group_chat(name="audit log sample data")
+
         # promote chat
         chat.send_text("hello")
         assert chat.is_promoted()
@@ -811,12 +810,6 @@ class TestOfflineChat:
         chat.set_name("audit log test group")
         chat.send_text("a message in between")
 
-        lp.sec("check message count of all messages")
-        assert len(chat.get_messages()) == 4
-
         lp.sec("check message count of only system messages (without daymarkers)")
-        dc_array = ffi.gc(
-            lib.dc_get_chat_msgs(ac1._dc_context, chat.id, dc.const.DC_GCM_INFO_ONLY, 0),
-            lib.dc_array_unref,
-        )
-        assert len(list(iter_array(dc_array, lambda x: x))) == 2
+        sysmessages = [x for x in chat.get_messages() if x.is_system_message()]
+        assert len(sysmessages) == 3