Do a sanity check of the inferencer module

[SebieF]

Predictions for a secondary structure model (dataset) should about match those from the prottrans paper.

This could also be used to create a new test for the inferencer module with pre-calculated embeddings.

Another option would be to add a complete end-2-end test, using the same configuration as for the secondary structure prediction, but using one_hot_encoding embeddings for the test for performance issues.