Fix remaining_range_total on new electric-only vehicles

[rikroe]

Proposed change

Fixes doubled remaining_range_total on newer electric only vehicles.

As parsing had to be based on DriveTrainType, some refactoring had to be done (mainly moving DriveTrainType into a separate file to avoid circular imports).

While implementing, it became clear that we do not need a separate attribute for range extender cars, so I removed that as well.

Type of change

• Bugfix (non-breaking change which fixes an issue)
• New feature (which adds functionality to this library)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue: BMW Connected Drive shows wrong remaining_range_total home-assistant/core#74703

Checklist

• The code change is tested and works locally.
• Tests have been added to verify that the new code works.

[codecov-commenter]

Codecov Report

Merging #469 (3874e16) into master (117bb06) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #469   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           16        16           
  Lines         1257      1211   -46     
=========================================
- Hits          1257      1211   -46     

Flag	Coverage Δ
3.10.x	100.00% <100.00%> (ø)
3.6	99.91% <100.00%> (-0.01%)	⬇️
3.7	100.00% <100.00%> (ø)
3.8	100.00% <100.00%> (ø)
3.9	100.00% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
bimmer_connected/vehicle/__init__.py	100.00% <100.00%> (ø)
bimmer_connected/vehicle/const.py	100.00% <100.00%> (ø)
bimmer_connected/vehicle/fuel_and_battery.py	100.00% <100.00%> (ø)
bimmer_connected/vehicle/vehicle.py	100.00% <100.00%> (ø)
bimmer_connected/const.py

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[github-actions]

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