config: add support for configuring propagators

[codeboten]

Problem Statement

Configuring propagators via the config doesn't currently work, this needs to be done.

Proposed Solution

Use the propagators from the configuration and set the propagators

Alternatives

This can be achieved via manually setting propagators

[dmathieu]

This hasn't been updated in a while, and the linked PR hints that @jpkrohling won't be working on this in the near future. So I'm unassigning.

[codeboten]

Can you assign this to me, i'll take a look at this next