Reduce memory usage for certain image metrics

[SkafteNicki]

What does this PR do?

Fixes #2078
For SpectralAngleMapper and UniversalImageQualityIndex the use of list state is not necessary for sum and mean reductions, and using tensor states instead in these cases are more memory efficient.
The unittests are still covering that the calculations are correct.

Before submitting

• Was this discussed/agreed via a Github issue? (no need for typos and docs improvements)
• Did you read the contributor guideline, Pull Request section?
• Did you make sure to update the docs?
• Did you write any new necessary tests?

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📚 Documentation preview 📚: https://torchmetrics--2089.org.readthedocs.build/en/2089/

[codecov]

Codecov Report

Merging #2089 (8dc3e07) into master (e55fd0c) will decrease coverage by 46%.
The diff coverage is 61%.

Additional details and impacted files

@@           Coverage Diff            @@
##           master   #2089     +/-   ##
========================================
- Coverage      87%     41%    -46%     
========================================
  Files         293     293             
  Lines       16299   16327     +28     
========================================
- Hits        14177    6629   -7548     
- Misses       2122    9698   +7576