Bug with StandardizedMatrix transpose matvec

[Marc-Antoine Schmidt]

Our testing unfortunately did not cover the scaled StandardizedMatrix case due to a typo.
(we tested the centered but unscaled StandardizedMatrix twice)
https://github.com/Quantco/quantcore.matrix/blob/master/tests/test_matrices.py#L95-L100

Correcting this, the test test_transpose_matvec_out_parameter is failing with all the new matrices.

[Marc-Antoine Schmidt]

Preliminary investigation: I think this is more likely to be a bug with the test itself.

[Luca Bittarello]

Is this issue still an issue after #94?

[Marc-Antoine Schmidt]

Thanks for pointing that out. No it's not.