Add Support for NonGeoDatasets

[Pale-Blue-Dot-97]

This major PR adds experimental support for NonGeoDatasets to minerva.

Warning

This new functionality is still somewhat experimental. Effort has been made to eliminate bugs and replicate the same functionality of GeoDataset with NonGeoDataset but there are some gaps.

Updates

• Closes Support torchgeo.datasets.NonGeoDataset #426
• Split PairedDataset into PairedGeoDataset and PairedNonGeoDataset
• Split SSL4EOS12Sentinel2 into GeoSSL4EOS12Sentinel2 and NonGeoSSL4EOS12Sentinel2
• NEW: PairedConcatDataset. Replicates the functions of PairedUnionDataset but for NonGeoDataset.
• NEW: MinervaNonGeoDataset. Extension of NonGeoDataset that adds a __or__ method so that the dataset1 | dataset2 syntax still works.
• NEW: MultiSpectralDataset. Generic dataset for multi-spectral imagery using both NonGeoDataset and VisionDataset.
• Updates to factory.py to support NonGeoDataset
• New tests to cover new functionality
• example_GeoSimConvNet.yml now uses NonGeoSSL4EOS12Sentinel2 (and associated changes)

Note

From a user perspective, there are no breaking changes. As long as you are using minerva via the YAML or CLI, no changes are needed.

Major contributions from @jonhare

[codecov]

Codecov Report

Attention: 66 lines in your changes are missing coverage. Please review.

Comparison is base (ca9b74f) 98.43% compared to head (80cc1af) 97.77%.
Report is 290 commits behind head on beta.

❗ Current head 80cc1af differs from pull request most recent head 3d2d33e. Consider uploading reports for the commit 3d2d33e to get more accurate results

Files	Patch %	Lines
minerva/datasets/paired.py	88.33%	14 Missing ⚠️
minerva/datasets/factory.py	89.83%	12 Missing ⚠️
minerva/datasets/utils.py	68.96%	9 Missing ⚠️
minerva/models/siamese.py	78.57%	9 Missing ⚠️
minerva/logger/tasklog.py	95.34%	6 Missing ⚠️
minerva/models/core.py	91.37%	5 Missing ⚠️
minerva/tasks/core.py	98.11%	3 Missing ⚠️
minerva/logger/steplog.py	95.23%	2 Missing ⚠️
minerva/modelio.py	94.73%	2 Missing ⚠️
minerva/tasks/knn.py	97.14%	2 Missing ⚠️
... and 2 more

Additional details and impacted files

@@            Coverage Diff             @@
##             beta     #433      +/-   ##
==========================================
- Coverage   98.43%   97.77%   -0.66%     
==========================================
  Files          32       39       +7     
  Lines        3631     4143     +512     
==========================================
+ Hits         3574     4051     +477     
- Misses         57       92      +35     

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