Add weekly/monthly test to CI for large model

[JoerivanEngelen]

We currently don't do any automatic testing on large models. Would be good to process a large model on TeamCity to see if performance recent changes didn't cause any major performance loss and to reassure that iMOD Python can still deal with large, complex datasets.

The LHM-fresh salt could be used for this. When we have the iMOD5 backwards compatibility, we could also test on LHM fresh.
This also serves as a user acceptance test.

[JoerivanEngelen]

UPDATE

I added a user_acceptance pytest mark to the imod5_converter_feature_branch, which can be used to run the user acceptance tests. This uses an environmental variable: LHM_PRJ, which is the path to the LHM projectfile, that has to be imported, defined in a .env file. Tests can be run with pixi run user_acceptance. Test takes 4 minutes on my local machine (with 32 GB...).

We can use this to run the tests on TeamCity

[JoerivanEngelen]

UPDATE 2

The test plan now covers a test for a performance test. The described steps can be transferred into a TeamCity pipeline.