Avoid creation of `System:IEquatable` and `System:Object` exchanges

[ramonsmits]

Describe the suggested improvement

Is your improvement related to a problem? Please describe.

The following exchanges are created:

• System:IEquatable
• System:Object
• System:ValueType (when using structs)
• System:Enum
• System:IComparable
• System:IConvertible
• System.IEquatable
• System.IFormatable

Describe the suggested solution

Ignore these specific or all System types in https://github.com/Particular/NServiceBus.RabbitMQ/blob/master/src/NServiceBus.Transport.RabbitMQ/Routing/ConventionalRoutingTopology.cs

Describe alternatives you've considered

API to add specific message type exclusion

Additional Context

No response

[bording]

Making a change like this would be a wire compatibility breaking change. This is not the sort of thing we should do to an existing routing topology.

If we ever decided to implement a new routing topology, we could consider this in the design.