🔨 Maintenance/pyupgrade code base targeting py3.9

[pcrespov]

What do these changes do?

The entire repo (*) use python 3.9.
Upgrading to the new syntax (e.g. List -> list-like ) is very time consuming, noisy and error-prone.

This PR uses pyupgrade to automatically upgrade targeted code syntax to py3.9

• 🔥 we start (this PR) with some non-critical code base in the repo (namely tests, api and packages/settings-library). Subsequent PRs will address packages and then one service at a time.
• 🔨 Adds pre-commit hook that applies pyupgrade to modified code
• 🔨Adds scripts/pyupgrade.bash
• 📝 adds some doc on python versioning (draft) since this tool can also assist in future python's upgrades

(*) Except for services/director and some files in packages/pytest-simcore used as well there

How to test

• 100% test coverage should ideally cover this

TODO

• pre-commit hook
• shell script in scripts/ with containarized tool
• make recipe
• document py ugrade

[codecov]

Codecov Report

Merging #3122 (3c75fe5) into master (1ef2b40) will decrease coverage by 0.0%.
The diff coverage is 100.0%.

@@           Coverage Diff            @@
##           master   #3122     +/-   ##
========================================
- Coverage    81.0%   80.9%   -0.1%     
========================================
  Files         706     706             
  Lines       30458   30457      -1     
  Branches     3945    3945             
========================================
- Hits        24673   24657     -16     
- Misses       4938    4951     +13     
- Partials      847     849      +2     

Flag	Coverage Δ
integrationtests	65.8% <ø> (-0.1%)	⬇️
unittests	77.2% <100.0%> (-0.1%)	⬇️

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

Impacted Files	Coverage Δ
...settings-library/src/settings_library/utils_cli.py	78.1% <100.0%> (ø)
...ings-library/src/settings_library/utils_r_clone.py	100.0% <100.0%> (ø)
...rvice_datcore_adapter/utils/requests_decorators.py	68.4% <0.0%> (-10.6%)	⬇️
...imcore_service_webserver/garbage_collector_task.py	94.8% <0.0%> (-5.2%)	⬇️
...imcore_service_webserver/garbage_collector_core.py	65.2% <0.0%> (-3.7%)	⬇️
...ore_service_director_v2/utils/client_decorators.py	73.3% <0.0%> (-3.4%)	⬇️
...e_service_director_v2/modules/dask_clients_pool.py	92.7% <0.0%> (-1.5%)	⬇️
...tor_v2/modules/dynamic_sidecar/scheduler/events.py	91.3% <0.0%> (-1.1%)	⬇️
...simcore_service_director_v2/modules/dask_client.py	91.9% <0.0%> (-0.7%)	⬇️
...ector_v2/modules/dynamic_sidecar/scheduler/task.py	82.1% <0.0%> (-0.5%)	⬇️
... and 4 more

[GitHK]

Nice! Glad this will go out of the way.
Please see below some minor stuff and questions.

[sanderegg]

pretty nice tool!
so the idea is to use it later on right? cause I can imagine some PR will be not so nice to merge afterwards...

[pcrespov]

Yes. Easy. That is why this PR only upgrades non-critical packages
In addition, there is now the pre-commit hook. So from now on, whatever gets changed it is also upgraded on the fly

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.5% Duplication

[dyollb]

Nice!