[#2899] Integrate OpenKlantConfig and OpenKlant2Config #8380

Job	Run time
Build and check documentation	1m 37s
End-to-end tests, chromium	4m 13s
Check that documentation for configuration steps is up-to-date	0s
End-to-end tests, firefox	4m 37s
Run the Django test suite (main)	20m 27s
End-to-end tests, webkit	4m 26s
Run the Django test suite (elastic)	5m 10s
End-to-end tests, msedge	5m 37s
Run the Django test suite (openklant)	2m 9s
Run the Django test suite (sequential)	3m 33s
Build (and push) Docker image	0s
Upload coverage information to codecov	0s
	51m 49s

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