Maintenance/cleanup api server

[pcrespov]

What do these changes do?

During the design of this first version, there were many variants of the design that remained in the code. This PR cleans up all the deprecated code before extending it with new features. Some relevant changes:

• Pruned and upgraded requirements
• Removed trials sandbox folder
• Removed unused models, db repos and routes
• Left only basic authentication
• Added client wrapper for webserver sessions (see osparc-simcore/services/api-server/src/simcore_service_api_server/services/webserver.py)
• Reverted logger from loguru to default python logger
• documented dev: services/api-server/README.md

Some of the code that was removed will probably be reintegrated when actually needed (e.g. other authentication schemes)

How to test

unit testing in

make devenv
cd services/api-tests
make install-dev tests

and read README.md for manual tests of the API

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 (partially)
• Runs in the swarm
• Documentation reflects the changes
• New module? Add your github username to .github/CODEOWNERS

[codecov]

Codecov Report

Merging #1578 into master will increase coverage by 1.0%.
The diff coverage is 53.2%.

@@           Coverage Diff            @@
##           master   #1578     +/-   ##
========================================
+ Coverage    72.4%   73.4%   +1.0%     
========================================
  Files         282     271     -11     
  Lines       10908   10721    -187     
  Branches     1191    1172     -19     
========================================
- Hits         7900    7873     -27     
+ Misses       2662    2504    -158     
+ Partials      346     344      -2     

Flag	Coverage Δ
#integrationtests	56.7% <ø> (ø)
#unittests	67.0% <53.2%> (+0.9%)	⬆️

Impacted Files	Coverage Δ
...imcore_service_api_server/db/repositories/_base.py	71.4% <ø> (ø)
...mcore_service_api_server/services/serialization.py	0.0% <ø> (ø)
...src/simcore_service_api_server/api/routes/users.py	48.0% <25.0%> (+10.8%)	⬆️
...c/simcore_service_api_server/services/webserver.py	52.6% <40.8%> (-23.2%)	⬇️
...vice_api_server/api/dependencies/authentication.py	50.0% <50.0%> (-50.0%)	⬇️
...rver/src/simcore_service_api_server/core/events.py	78.5% <60.0%> (-5.5%)	⬇️
...e_service_api_server/api/dependencies/webserver.py	57.6% <66.6%> (+5.8%)	⬆️
...ver/src/simcore_service_api_server/core/openapi.py	59.3% <66.6%> (+1.3%)	⬆️
...ore_service_api_server/db/repositories/api_keys.py	52.6% <75.0%> (+2.6%)	⬆️
...imcore_service_api_server/services/remote_debug.py	50.0% <75.0%> (+3.3%)	⬆️
... and 8 more

[GitHK]

OK, had a comment for one of your comments.
As far as authentication goes we'd might want to migrate to something more microservice oriented.

[sanderegg]

deleting stuff is always good!
2 questions in the comments.
👍