Introducing calibration factors for each channel

[sgiardie]

I have modified the function _get_calibrated_spectra inserting also calibration factors for each frequency cal_93, cal_145, cal_225. In order to preserve the previous version of the code, I added these lines to fix the new factors to one if they are not given as inputs. There was no need to modify the syslibrary class.
@paganol @mgerbino what do you think? Do you prefer having a different function?

[sgiardie]

I also merged the simonsobs/master to this branch, leaving the modifications I've done in theoryforge_mflike. Everything else should be as in simonsobs/master

[sgiardie]

I actually removed the condition to fix the new calibration params to the default if they are not present in the .yaml file used for the run, since the default should be taken from MFLike.yaml. I also added the new cal params in the self.expected_params_nuis. So if the params are not considered by the user, the treatment is the same as before