Bugfix/allow reading groups anonymous user

[sanderegg]

What do these changes do?

fixes anonymous access to studies fails because /groups endpoint is forbidden

Related issue number

How to test

Checklist

• Did you change any service's API? Then make sure to bundle document and upgrade version (make openapi-specs, git commit ... and then make version-*)
• Unit tests for the changes exist
• Runs in the swarm
• Documentation reflects the changes
• New module? Add your github username to .github/CODEOWNERS

[codecov]

Codecov Report

Merging #1615 into master will decrease coverage by 1.6%.
The diff coverage is 100.0%.

@@           Coverage Diff            @@
##           master   #1615     +/-   ##
========================================
- Coverage    75.3%   73.6%   -1.7%     
========================================
  Files         241     278     +37     
  Lines        9838   10854   +1016     
  Branches     1063    1175    +112     
========================================
+ Hits         7415    7999    +584     
- Misses       2110    2514    +404     
- Partials      313     341     +28     

Flag	Coverage Δ
#integrationtests	56.8% <100.0%> (ø)
#unittests	67.3% <100.0%> (-1.1%)	⬇️

Impacted Files	Coverage Δ
...er/src/simcore_service_webserver/security_roles.py	100.0% <ø> (ø)
...r/src/simcore_service_webserver/groups_handlers.py	82.4% <100.0%> (ø)
.../service-library/src/servicelib/openapi_servers.py	0.0% <0.0%> (ø)
...ackages/service-library/src/servicelib/__init__.py	100.0% <0.0%> (ø)
...ckages/service-library/src/servicelib/resources.py	0.0% <0.0%> (ø)
...s/service-library/src/servicelib/rest_responses.py	80.0% <0.0%> (ø)
...rvice-library/src/servicelib/openapi_validation.py	39.4% <0.0%> (ø)
...ervice-library/src/servicelib/application_setup.py	81.0% <0.0%> (ø)
packages/service-library/src/servicelib/utils.py	67.5% <0.0%> (ø)
...ages/service-library/src/servicelib/application.py	0.0% <0.0%> (ø)
... and 30 more