TST: Add Tests for insert and delete

Integration tests for https://gitlab.indiscale.com/caosdb/customers/lfpb/management/-/issues/394 and caosdb-cpplib!4 (merged).

test/test_transaction.cpp

@@ -55,7 +55,7 @@ TEST(test_transaction, DISABLED_retrieve_manufacturer_by_id) {
   EXPECT_EQ(name, entity.GetName());
   EXPECT_EQ(role, entity.GetRole());
   EXPECT_EQ(description, entity.GetDescription());
-  EXPECT_EQ(version, entity.GetVersion());
+  EXPECT_EQ(version, entity.GetVersionId());
 }
 
 TEST(test_transaction, retrieve_non_existing) {