[bgp]: Fix bgp crash after BGP allow list configuration is added (#6088)

The issue was a typo introduced in #6006. In that change, the BGP allow list
configuration manager was updated to use a method of common ConfigMgr
for restarting peer groups. However, the method name 'restart_peers' was
used instead of the correct 'restart_peer_groups'.

This change updated the managers_allow_list.py to use correct method
'restart_peer_groups' for restarting peer groups.

Signed-off-by: Xin Wang <xiwang5@microsoft.com>

src/sonic-bgpcfgd/bgpcfgd/managers_allow_list.py

@@ -149,7 +149,7 @@ def __update_policy(self, deployment_id, community_value, prefixes_v4, prefixes_
         if cmds:
             self.cfg_mgr.push_list(cmds)
             peer_groups = self.__find_peer_group_by_deployment_id(deployment_id)
-            self.cfg_mgr.restart_peers(peer_groups)
+            self.cfg_mgr.restart_peer_groups(peer_groups)
             log_debug("BGPAllowListMgr::__update_policy. The peers configuration scheduled for updates")
         else:
             log_debug("BGPAllowListMgr::__update_policy. Nothing to update")
@@ -179,7 +179,7 @@ def __remove_policy(self, deployment_id, community_value):
         if cmds:
             self.cfg_mgr.push_list(cmds)
             peer_groups = self.__find_peer_group_by_deployment_id(deployment_id)
-            self.cfg_mgr.restart_peers(peer_groups)
+            self.cfg_mgr.restart_peer_groups(peer_groups)
             log_debug("BGPAllowListMgr::__remove_policy. 'Allow list' policy was scheduled for removal")
         else:
             log_debug("BGPAllowListMgr::__remove_policy. Nothing to remove")