Change to using OCF Datapipe's BatchKey

[jacobbieker]

Pull Request

Description

Turns out Enums can't just be used if they are the same name, this makes them identical by using ocf_datapipe's BatchKey's instead

Fixes #

How Has This Been Tested?

Existing unit tests

• [ ] Yes

If your changes affect data processing, have you plotted any changes? i.e. have you done a quick sanity check?

• [ ] Yes

Checklist:

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

[codecov-commenter]

Codecov Report

Merging #198 (e75c2cf) into main (a1cb33e) will decrease coverage by 1.34%. The diff coverage is 84.21%.

@@            Coverage Diff             @@
##             main     #198      +/-   ##
==========================================
- Coverage   39.07%   37.73%   -1.35%     
==========================================
  Files          47       47              
  Lines        2641     2584      -57     
==========================================
- Hits         1032      975      -57     
  Misses       1609     1609              

Impacted Files	Coverage Δ
power_perceiver/consts.py	100.00% <ø> (ø)
...tch_processor/delete_forecast_satellite_imagery.py	0.00% <0.00%> (ø)
power_perceiver/np_batch_processor/save_t0_time.py	0.00% <0.00%> (ø)
power_perceiver/production/model.py	33.33% <33.33%> (ø)
...erceiver/load_prepared_batches/data_sources/gsp.py	31.42% <100.00%> (+2.01%)	:arrow_up:
...pared_batches/data_sources/prepared_data_source.py	56.86% <100.00%> (ø)
...perceiver/load_prepared_batches/data_sources/pv.py	27.27% <100.00%> (+1.69%)	:arrow_up:
...er/load_prepared_batches/data_sources/satellite.py	43.33% <100.00%> (+1.95%)	:arrow_up:
...erceiver/load_prepared_batches/data_sources/sun.py	44.44% <100.00%> (+2.13%)	:arrow_up:
...erceiver/load_prepared_batches/prepared_dataset.py	34.66% <100.00%> (ø)
... and 17 more

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