Add coturn endpoint that generates token

[Sheikah45]

No description provided.

[codecov]

Codecov Report

Merging #731 (9e7d709) into develop (2092e50) will increase coverage by 0.29%.
The diff coverage is 96.42%.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop     #731      +/-   ##
=============================================
+ Coverage      76.20%   76.49%   +0.29%     
- Complexity      1161     1174      +13     
=============================================
  Files            243      244       +1     
  Lines           3706     3731      +25     
  Branches         233      234       +1     
=============================================
+ Hits            2824     2854      +30     
+ Misses           785      779       -6     
- Partials          97       98       +1     

Impacted Files	Coverage Δ
src/main/java/com/faforever/api/error/Error.java	100.00% <ø> (ø)
...com/faforever/api/coturn/CoturnServerEnricher.java	95.00% <95.00%> (ø)
...va/com/faforever/api/data/domain/CoturnServer.java	100.00% <100.00%> (+83.33%)	⬆️
...c/main/java/com/faforever/api/error/ErrorCode.java	99.13% <100.00%> (+<0.01%)	⬆️
...ever/api/featuredmods/FeaturedModFileEnricher.java	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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