Fix #2793: Campaigns work on Beta

[domdomegg]

Description (required)

Fixes #2793: Beta Campaigns

What changes did you make and why?

• Pulled the Wikimedia campaigns URL into the build config
• Created endpoint in campaigns repo

Requires commons-app/campaigns#5 to be merged before this.

Tests performed (required)

Tested 2.10.1-debug-beta-campaigns~031f334c0 using domdomegg fork.

[misaochan]

Thanks for the PR @domdomegg , but I'm a bit confused. Does this only affect beta, or will it affect prod as well?

(Edit: I just saw the changes at commons-app/campaigns#5 , which explains my confusion - let's carry on the discussion there. :) )

[codecov-io]

Codecov Report

Merging #2798 into master will increase coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master   #2798      +/-   ##
=========================================
+ Coverage    3.83%   3.84%   +<.01%     
=========================================
  Files         267     267              
  Lines       12529   12522       -7     
  Branches     1083    1082       -1     
=========================================
  Hits          481     481              
+ Misses      12015   12008       -7     
  Partials       33      33

Impacted Files	Coverage Δ
.../java/fr/free/nrw/commons/di/NetworkingModule.java	0% <ø> (ø)	⬆️
...ee/nrw/commons/media/MediaDetailPagerFragment.java	0% <0%> (ø)	⬆️

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