Temporary downgrade to pytest 7.4.4

pytest versions 8.0.*, 8.1.* and 8.2.* (at least up to 8.2.2) skip the `plugins` folder, thus skipping the tests of the plugins.

Temporary downgrade to pytest 7.4.4.
In case the issue doesn't get fixed, we might have to change the folder structure

requirements.txt

@@ -17,7 +17,7 @@ tiletanic
 sentry-sdk
 
 # Tests
-pytest
+pytest == 7.4.4 # In v8 it skips the plugins folder, see our issue #2266 and https://github.com/pytest-dev/pytest/issues/12605
 xmltodict
 termcolor
 pylama