Update CI workflows to use pytest

[jerbob]

No description provided.

[codecov]

Codecov Report

Merging #120 (22babd2) into master (6388497) will increase coverage by 0.23%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #120      +/-   ##
==========================================
+ Coverage   94.23%   94.46%   +0.23%     
==========================================
  Files         121      122       +1     
  Lines        4580     4664      +84     
  Branches      252      265      +13     
==========================================
+ Hits         4316     4406      +90     
+ Misses        230      214      -16     
- Partials       34       44      +10     

Impacted Files	Coverage Δ
src/backend/storages.py
src/sockets/consumers.py
src/backend/settings/lint.py	100.00% <0.00%> (ø)
src/backend/settings/__init__.py	72.46% <0.00%> (ø)
src/backend/exception_handler.py	75.67% <0.00%> (ø)
src/config/backends.py	85.24% <0.00%> (+1.63%)	⬆️

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[0xAda]

lgtm

[Bentechy66]