Allow starting remotebmi containers

[BSchilperoort]

This PR adds support for remotebmi.

The arguments between grpc4bmi and remotebmi differ subtlety, so I had to add an extra "protocol" property to the eWaterCycle Model class.

eg:

RemoteBMIModel(eWaterCycleModel):
    bmi_image: ContainerImage("ghcr.io/ewatercycle/ewatercycle-walrus:latest")
    protocol= "openapi"
...

[codecov]

Codecov Report

Attention: Patch coverage is 31.25000% with 11 lines in your changes missing coverage. Please review.

Project coverage is 78.92%. Comparing base (258cd7f) to head (f66a4a0).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ewatercycle/container.py	21.42%	10 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #467      +/-   ##
==========================================
- Coverage   79.32%   78.92%   -0.41%     
==========================================
  Files          28       28              
  Lines        1862     1874      +12     
  Branches      155      159       +4     
==========================================
+ Hits         1477     1479       +2     
- Misses        327      336       +9     
- Partials       58       59       +1     

Files with missing lines	Coverage Δ
src/ewatercycle/base/model.py	97.31% <100.00%> (+0.01%)	⬆️
src/ewatercycle/container.py	66.31% <21.42%> (-3.52%)	⬇️