feat: user supported protocols

[PatrykBuniX]

Adds support for the list of supported protocols on user. It was part of this PR #15247 first, but decided to move it here not to make that one too big.

This PR also adds SelfRepository that contains the logic related with self user - it's consuming self service, similarly as UserRepository consumes userService etc. SelfRepository contains the logic of updating the list of supported protocols of the self user.

Since we don't want to have this functionality on prod, updating the list of self supported protocols is hidden under the feature flag.

[codecov]

Codecov Report

Merging #15496 (a6a74c2) into dev (33d804f) will increase coverage by 0.19%.
Report is 14 commits behind head on dev.
The diff coverage is 64.02%.

@@            Coverage Diff             @@
##              dev   #15496      +/-   ##
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+ Coverage   43.43%   43.62%   +0.19%     
==========================================
  Files         649      653       +4     
  Lines       22086    22241     +155     
  Branches     5051     5080      +29     
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+ Hits         9593     9703     +110     
- Misses      11260    11296      +36     
- Partials     1233     1242       +9