[DO NOT MERGE] Split acceptance tests

[SzymonPobiega]

This PR builds upon locally deployed packages. It depends on:

• https://github.com/Particular/NServiceBus/pull/6836

PoA

Once https://github.com/Particular/NServiceBus/pull/6836 is merged and released:

• [ ] Delete local.packages folder
• [ ] Revert local package source in nuget.config
• [ ] Update the projects to the released version

[kbaley]

Closing. We're going to rework how the acceptance tests are organized at a later date