[SIGMON-334] Failing tests due to the distutil's deprecation warnings

Context

• task: https://its.cern.ch/jira/browse/SIGMON-334

What was done

• distutils' deprecation warning filter out from the list of the intercepted warnings before asserting
• jinja2 version set to <3.1.1 so the docs can be generated

TODO

• Clarify if we want to use warnings or maybe it would be cleaner to use logging (should be done in the scope of https://its.cern.ch/jira/browse/SIGMON-228)

QA

• sonar: http://sonar.cern.ch/dashboard?branch=SIGMON-334_failing_tests_warnings&id=lhc-sm-api
• unit tests are passing

Review objectives

• assessment of code functionality
• assessment of code quality
• identifying potential refactorings / logic common to other projects
• knowledge sharing