Lists of input parameters in initial conditions

[pipliggins]

Re-implementation of #5191 for clearer implementation history

Allows input parameters used as initial conditions to be included within lists of inputs to the solver by converting model.y0 to model.y0_list, and calculating one initial state per input parameter set.

This rolls back a lot of the changes made by #4981 as the functionality is added to all the solvers; the initial_conditions argument added for IDAKLU has been removed in favour of allowing all inputs to be included within inputs.

Fixes #5154
Fixes #5131

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Codecov Report

❌ Patch coverage is 99.03846% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 98.79%. Comparing base (a0b2614) to head (8d2cb3c).
⚠️ Report is 2 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/pybamm/solvers/base_solver.py	98.23%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5311      +/-   ##
===========================================
+ Coverage    98.76%   98.79%   +0.02%     
===========================================
  Files          323      323              
  Lines        27744    27729      -15     
===========================================
- Hits         27402    27394       -8     
+ Misses         342      335       -7     

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[martinjrobins]

this looks great, thanks @pipliggins, all good to merge from me, although there was a failing test runner?

[pipliggins]

this looks great, thanks @pipliggins, all good to merge from me, although there was a failing test runner?

I think that was just the link checker, but I've merged develop and will check again.