Add calculate_singular_value_decompositon as a backend method

[renatomello]

This is needed in #1471

Checklist:

• Reviewers confirm new code works as expected.
• Tests are passing.
• Coverage does not decrease.
• Documentation is updated.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.93%. Comparing base (a59e5d7) to head (af57061).
Report is 16 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1473   +/-   ##
=======================================
  Coverage   99.93%   99.93%           
=======================================
  Files          81       81           
  Lines       11777    11786    +9     
=======================================
+ Hits        11769    11778    +9     
  Misses          8        8           

Flag	Coverage Δ
unittests	99.93% <100.00%> (+<0.01%)	⬆️

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