2D osgb sat coords

[JackKelly]

Pull Request

This is the correct PR for this issue!

Description

Give fake hrv batches 2D osgb coords. Because "real" satellite data has 2D osgb coords.

Fixes #695

How Has This Been Tested?

• [x] Yes, unittests pass

Checklist:

• [x] My code follows OCF's coding style guidelines
• [x] I have performed a self-review of my own code
• [x] I have made corresponding changes to the documentation
• [ ] I have added tests that prove my fix is effective or that my feature works
• [x] I have checked my code and corrected any misspellings

[codecov-commenter]

Codecov Report

Merging #700 (14b9f96) into jack/tidy_fake_coordinates (74f9a20) will increase coverage by 0.01%. The diff coverage is 100.00%.

@@                      Coverage Diff                       @@
##           jack/tidy_fake_coordinates     #700      +/-   ##
==============================================================
+ Coverage                       93.24%   93.26%   +0.01%     
==============================================================
  Files                              48       48              
  Lines                            3391     3401      +10     
==============================================================
+ Hits                             3162     3172      +10     
  Misses                            229      229              

Impacted Files	Coverage Δ
nowcasting_dataset/data_sources/fake/batch.py	86.97% <100.00%> (+0.30%)	:arrow_up:
...owcasting_dataset/data_sources/fake/coordinates.py	91.66% <100.00%> (+1.04%)	:arrow_up:

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