fix: include givenName and familyName in the GET /signup response

[mfrancisc]

Add givenName and familyName in the GET /signup response. Those will be used in the UI for the welcome message ( at least the givenName ).

Jira: https://issues.redhat.com/browse/SANDBOX-1152

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alexeykazakov, fbm3307, mfrancisc

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[alexeykazakov]

/lgtm

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.10%. Comparing base (291379f) to head (0eb4754).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #529      +/-   ##
==========================================
+ Coverage   81.09%   81.10%   +0.01%     
==========================================
  Files          43       43              
  Lines        3518     3520       +2     
==========================================
+ Hits         2853     2855       +2     
  Misses        578      578              
  Partials       87       87              

Flag	Coverage Δ
unittests	81.10% <100.00%> (+0.01%)	⬆️

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