[aclorch] Do not fail ACL rule remove flow if rule already deleted (sonic-net#2183)

- What I did
Do not fail ACL rule remove flow if rule already deleted.

- Why I did it
When ACL table that contains rules is being deleted, its rules are being deleted automatically.
In the case when ACL rule handler is called for a rule that was already deleted, handler should do nothing and pass.

- How I verified it
config acl add table -p Ethernet72 -s ingress DATAACL L3
config acl update full /tmp/56521_acl_file.json
config acl add table -p Ethernet72 -s egress DATAACL L3
config acl update full 56521_acl_file.json
docker exec -it syncd sx_api_flex_acl_dump.py => verify ACL rules exist in "ACL Rules" table.

Co-authored-by: liora <[email protected]>

Author: liorghub

orchagent/aclorch.cpp

@@ -3617,7 +3617,9 @@ bool AclOrch::removeAclRule(string table_id, string rule_id)
     auto rule = getAclRule(table_id, rule_id);
     if (!rule)
     {
-        return false;
+        SWSS_LOG_NOTICE("ACL rule [%s] in table [%s] already deleted",
+                        rule_id.c_str(), table_id.c_str());
+        return true;
     }
 
     if (rule->hasCounter())

tests/mock_tests/aclorch_ut.cpp

@@ -1719,4 +1719,28 @@ namespace aclorch_test
         ASSERT_TRUE(orch->m_aclOrch->removeAclRule(rule->getTableId(), rule->getId()));
     }
 
+    TEST_F(AclOrchTest, deleteNonExistingRule)
+    {
+        string tableId = "acl_table";
+        string ruleId = "acl_rule";
+
+        auto orch = createAclOrch();
+
+        // add acl table
+        auto kvfAclTable = deque<KeyOpFieldsValuesTuple>({{
+            tableId,
+            SET_COMMAND,
+            {
+                { ACL_TABLE_DESCRIPTION, "L3 table" },
+                { ACL_TABLE_TYPE, TABLE_TYPE_L3 },
+                { ACL_TABLE_STAGE, STAGE_INGRESS },
+                { ACL_TABLE_PORTS, "1,2" }
+            }
+        }});
+
+        orch->doAclTableTask(kvfAclTable);
+
+        // try to delete non existing acl rule
+        ASSERT_TRUE(orch->m_aclOrch->removeAclRule(tableId, ruleId));
+    }
 } // namespace nsAclOrchTest