Allows setting product user groups

[A-Guldborg]

This allows setting the product user groups when adding and updating products, including seeing products user groups.

This is necessary in order to manage products (enabling some products only to baristas etc.)

Front-end product management pull request for Shifty:
AnalogIO/shifty-webapp#20

[codecov-commenter]

Codecov Report

Attention: 16 lines in your changes are missing coverage. Please review.

Comparison is base (a5c0c45) 7.90% compared to head (f4d2be6) 7.89%.

Additional details and impacted files

@@            Coverage Diff             @@
##           develop    #223      +/-   ##
==========================================
- Coverage     7.90%   7.89%   -0.02%     
==========================================
  Files          163     163              
  Lines        10129   10143      +14     
  Branches       461     461              
==========================================
  Hits           801     801              
- Misses        9310    9324      +14     
  Partials        18      18              

Files	Coverage Δ
...ataTransferObjects/v2/Product/AddProductRequest.cs	0.00% <ø> (ø)
...ansferObjects/v2/Product/ChangedProductResponse.cs	0.00% <0.00%> (ø)
...TransferObjects/v2/Product/UpdateProductRequest.cs	0.00% <0.00%> (ø)
...DataTransferObjects/v2/Products/ProductResponse.cs	0.00% <0.00%> (ø)
...d/CoffeeCard.Library/Services/v2/ProductService.cs	14.43% <0.00%> (-1.85%)	⬇️

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[jonasanker]

Few changes requested :)

[jonasanker]

Be aware that I'm cleaning up parts of the Products endpoints in #224

[sonarcloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

94.4% Coverage
7.6% Duplication

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[jonasanker]

Great work. Approved ✅