Added LightningPose data to pooch dataset registry

[niksirbi]

I've updated the test datasets on GIN, specifically:

• I've added two sample output .csv files from LightningPoses (prefixed with 'LP')
• I've reduced the 'DLC_two-mice.predictions.csv` file in size, specifically I've extracted the first 10 minutes from it (previously this file was > 110 MB)

The poses_files_metadata.yaml and poses_registry.txt files have been updated accordingly and now contain the updated sha256 hashes.

This PR adds the new files and hashes to the dataset registry in datasets.py.

This is a pre-requisite for un-blocking #74. After this one gets merged, you can get started on that issue @DhruvSkyy

@b-peri tagging you as a reviewer so you're aware of these changes. After we merge this, you'll probably have to rebase your branch on this one, before you continue with #86

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (1f2338c) 98.34% compared to head (d3e4e17) 98.34%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #87   +/-   ##
=======================================
  Coverage   98.34%   98.34%           
=======================================
  Files           8        8           
  Lines         362      362           
=======================================
  Hits          356      356           
  Misses          6        6           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.