Make initial conditions independent of the parameter struct

[nefrathenrici]

Purpose

We want to slowly decouple the parameter struct from function calls and pass parameter values individually or at least more compactly. Initial conditions is a good initial example of this.

To-do

Apply changes to EDMF initial conditions

Content

• Change LocalState to include grav and thermo_params instead of params
• Remove most InitialConditions structs
• Change InitialConditions functions to take in only the necessary parameters
• Change get_initial_conditions to match the new structure

---

• I have read and checked the items on the review checklist.