Refactor modeltype `sediment`

[verseve]

Feature type

Refactor the sediment model, i.e., re-organize the model's code without adding new or removing existing features.

Improvement Description

The initialization of the sediment model takes place in one function (initialize_sediment_model) of over 140 lines of code. This is poorly maintainable and should be split up into smaller individual logical steps. In addition, the parameters used for initializing the sediment model are, currently, stored alongside the parameters of all other models / concepts in wflow. Sediment model parameters should be extracted into its own parameter Struct. The extraction of the sediment model parameters should include the re-coupling of sediment model parameter to other models that require access to sediment model parameters.

see also main issue https://github.com/Deltares/Wflow.jl/issues/351

Implementation Description

No response

Additional Context

No response

Tasks

• [ ] #425
• [ ] #451
• [ ] #453
• [ ] Store sediment model parameters in a separate Struct
• [ ] Refactor the sediment model to use its own parameter Struct instead of the Model struct
• [ ] Remove sediment model parameters from the Model struct
• [ ] Fix all sediment model parameter access invalidations