various fixes

[jokiefer]

fixes testsuite by reenginiering it:

• new docker container which has preinstalled python 3.9 and 3.10 based on debian bullseye with gdal 3.2.2.
• elasticsearch container to test against. In my pov this should be deprecated. Better would be to mock elasticsearch and test against the mock instead of this system test behavior.
• The test container run matrix tests by using tox against django version 4.0, 4.1 and 4.2 combined with python 3.9 and 3.10.
• If all tests successes, the container will exit with code 0.

No solution found for

• python 3.8 will raise sqlite3.Connection object has no attribute 'enable_load_extension' for all sqlite depending tests
• django 3.2 will raise django.db.utils.OperationalError: no such function: lwgeom_version for all spatial db depending tests

fixes also

#80, #81

[jokiefer]

@constantinius could you pls review, merge and bump a new realease. thx

[constantinius]

@jokiefer This PR is quite massive, I need more time to review to see if all of it is applicable.

[jokiefer]

@constantinius take your time. It was a lot of testing against the github action/docker container; thats why there are a flood of commits.