Use isort in MegaLinter

[johannaengland]

Dependent on #868 and #869.

Up for discussion if we want to start using isort in Argus, I just thought it might be nice since we also use it in Zino.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
1 Accepted issue

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.6% Duplication on New Code

See analysis details on SonarCloud

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 91.17647% with 6 lines in your changes missing coverage. Please review.

Project coverage is 84.23%. Comparing base (4f8776e) to head (aeba60b).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
src/argus/notificationprofile/media/email.py	50.00%	2 Missing ⚠️
src/argus/ws/asgi.py	0.00%	2 Missing ⚠️
src/argus/notificationprofile/media/base.py	0.00%	1 Missing ⚠️
...rc/argus/notificationprofile/media/sms_as_email.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #872      +/-   ##
==========================================
- Coverage   84.29%   84.23%   -0.07%     
==========================================
  Files          86       86              
  Lines        3973     3945      -28     
==========================================
- Hits         3349     3323      -26     
+ Misses        624      622       -2     

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[johannaengland]

Replaced by #916