🔨 New settings-library for settings

[pcrespov]

What do these changes do?

NEW packages/settings-library package for settings : implements new settings designed drafted in sample-app-settings repo.

Highlights

• settings_library.base defines new base class BaseCustomSettings:
  • implements create_from_envs constructor
  • sets BaseCustomSettings.Config
• settings_library.cli_utils defines a factory to create settings commands for typer CLI
• settings_library.celery, postgres, rabbit, redis, s3 reimplements models_library.settings.* using new settings design
  • all fields are UPPER_CASE
  • Uses @cached_property for read-only composed fields (e.g. urls). See tests for more details

In addition

• ADDS new fixtures pytest_simcore.cli_runner
• UPDATED storage service: replaces model_library.settings by settings_library
  • Adapts Settings
  • Simplifies CLI and improves tests

Related issue/s

This is one of the four PR issued to refactor settings. The other are:

1. 🔨 Updates settings and removes config files: storage service #2369: refactors storage (merged)
2. ♻️ Refactoring web-server settings and removing trafaret from the repo #2376: removes trafaret and refactors webserver
3. Replaces model_library.settings by settings_library in the entire repo

How to test

make devenv
cd packages/settings-library
make install-dev
make tests

cd ...
cd services/storage
make install-dev
make tests

[codecov]

Codecov Report

Merging #2395 (10846a8) into master (aad00a6) will decrease coverage by 0.7%.
The diff coverage is 85.7%.

@@           Coverage Diff            @@
##           master   #2395     +/-   ##
========================================
- Coverage    74.1%   73.3%   -0.8%     
========================================
  Files         523     532      +9     
  Lines       20415   20576    +161     
  Branches     2017    2025      +8     
========================================
- Hits        15131   15091     -40     
- Misses       4766    4959    +193     
- Partials      518     526      +8     

Flag	Coverage Δ
integrationtests	66.1% <ø> (-0.1%)	⬇️
unittests	66.7% <85.7%> (-1.1%)	⬇️

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

Impacted Files	Coverage Δ
services/storage/src/simcore_service_storage/db.py	70.2% <ø> (ø)
...ervices/storage/src/simcore_service_storage/dsm.py	71.9% <ø> (ø)
...settings-library/src/settings_library/cli_utils.py	58.6% <58.6%> (ø)
...ervices/storage/src/simcore_service_storage/cli.py	58.8% <60.0%> (-2.0%)	⬇️
...es/settings-library/src/settings_library/celery.py	86.6% <86.6%> (ø)
...ings-library/src/settings_library/logging_utils.py	86.6% <86.6%> (ø)
.../settings-library/src/settings_library/postgres.py	92.8% <92.8%> (ø)
...ges/settings-library/src/settings_library/redis.py	93.3% <93.3%> (ø)
...ages/settings-library/src/settings_library/base.py	94.1% <94.1%> (ø)
...es/settings-library/src/settings_library/rabbit.py	94.1% <94.1%> (ø)
... and 28 more

[GitHK]

Just a few minor comments.