Add 5D tensor support and tensor dim. test

[Zhack47]

Adds support for 5D tensors #203.

Description

Adding support for 5D tensors as input to a torchio.ScalarImage

Checklist

• I have read the CONTRIBUTING docs and have a developer setup (especially important are pre-commitand pytest)
• Non-breaking change (would not break existing functionality)
• Breaking change (would cause existing functionality to change)
• Tests added or modified to cover the changes
• Integration tests passed locally by running pytest
• In-line docstrings updated
• Documentation updated, tested running make html inside the docs/ folder
• This pull request is ready to be reviewed
• If the PR is ready and there are multiple commits, I have squashed them and force-pushed

[codecov]

Codecov Report

Merging #863 (53b6c5c) into main (2972958) will decrease coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #863      +/-   ##
==========================================
- Coverage   93.82%   93.77%   -0.06%     
==========================================
  Files          72       72              
  Lines        4535     4546      +11     
==========================================
+ Hits         4255     4263       +8     
- Misses        280      283       +3     

Impacted Files	Coverage Δ
torchio/data/image.py	87.90% <100.00%> (+0.26%)	⬆️
torchio/data/subject.py	94.79% <0.00%> (-2.12%)	⬇️

📣 Codecov can now indicate which changes are the most critical in Pull Requests. Learn more

[fepegar]

Hi, @Zhack47. Thanks for the PR. Please, next time discuss it in an issue first.

The new tests don't cover 5D inputs, as transforms are never really applied. I'm going to close this as, for now, support for 5D inputs is not planned.