♻️ webserver: fixes mypy issues in rest plugin

[pcrespov]

What do these changes do?

• ♻️ fixes mypy issues in webserver plugin rest
• ♻️ moves plugin to rest folder
• ♻️ protected names for internal modules

Related issue/s

• part of Maintenance: make mypy pass in all services/packages in repo #4071

How to test

cd services/web/server
make install-dev
pytest -vv tests/**/test_*rest*.py
make mypy | grep rest

[codecov]

Codecov Report

Merging #4334 (da8b76e) into master (36f9f79) will decrease coverage by 5.1%.
The diff coverage is 95.7%.

@@           Coverage Diff            @@
##           master   #4334     +/-   ##
========================================
- Coverage    83.2%   78.1%   -5.1%     
========================================
  Files         868     776     -92     
  Lines       35957   35549    -408     
  Branches      983     460    -523     
========================================
- Hits        29929   27783   -2146     
- Misses       5818    7668   +1850     
+ Partials      210      98    -112     

Flag	Coverage Δ
integrationtests	?
unittests	78.1% <95.7%> (-4.6%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../src/simcore_service_webserver/rest/healthcheck.py	74.1% <85.7%> (ø)
...er/src/simcore_service_webserver/rest/_handlers.py	58.1% <88.8%> (ø)
...ls-library/src/models_library/utils/change_case.py	100.0% <100.0%> (ø)
...erver/src/simcore_service_webserver/application.py	97.9% <100.0%> (ø)
.../simcore_service_webserver/application_settings.py	79.7% <100.0%> (-18.5%)	⬇️
...core_service_webserver/diagnostics/_healthcheck.py	43.7% <100.0%> (-53.2%)	⬇️
...rc/simcore_service_webserver/diagnostics/plugin.py	55.5% <100.0%> (-44.5%)	⬇️
...rc/simcore_service_webserver/director_v2/plugin.py	95.8% <100.0%> (ø)
...rver/src/simcore_service_webserver/login/plugin.py	90.0% <100.0%> (ø)
...ore_service_webserver/projects/_crud_read_utils.py	73.1% <100.0%> (-24.4%)	⬇️
... and 6 more

... and 435 files with indirect coverage changes

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codeclimate]

Code Climate has analyzed commit da8b76e and detected 0 issues on this pull request.

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