Marginalia changes breaking query exclusions for `pg_database_size(current_database())`

We've begun adding db_config_name: to the marginalia for some queries, which is breaking the exclusion list in https://gitlab.com/gitlab-org/database-team/gitlab-com-database-testing/-/blob/master/notifier/query_exclusion.rb#L8.

For example, the following query is being issued:

select pg_database_size(current_database()) /*application:test,db_config_name:main*/

Change the query exclusions to be more permissive about changes to marginalia.