Eventing functions listening to wildcard collections should ignore documents present in _system scope

 Issue

Create an Eventing function named test which listens to src_bucket..**.
Create a primary index on src_bucket.
Deploy the Eventing function test.

Observation

As we can see from the application logs Eventing function is mutating on documents which have been created with src_bucket._system._query collection.

2023-11-22T20:18:04.095-08:00 [INFO] "Doc created/updated" "cbo::00000000::_default._default(index)fbcdcbe78576ee4d" 

2023-11-22T20:18:04.094-08:00 [INFO] "Doc created/updated" "cbo::00000000::_default._default(histogram)(meta().id)" 

2023-11-22T20:18:04.094-08:00 [INFO] "Doc created/updated" "cbo::00000000::_default._default"

We need to ignore the documents created within _system scope.

In addition to this, we should also probably not allow listening to any collection with _system scope as this scope is only meant for internal use and not for end users.