Want Access to DELTAL/PCAL Correction Transfer Function w/ and w/o whitening

The recently created method in calcs.py to compute the corrections to a raw DELTAL/PCAL transfer function deltal_ext_pcal_corrrection includes the deltaL whitening (from parameter foton_deltal_whitening_tf) and PCAL whitening (from parameter pcal_dewhiten), as it should. But, far more often, we want to show the this transfer function before vs. after correcting for the "low frequency impacts of super Nyquist corrections" like that from LHO:63520 -- specifically syserrFunction_H1_proc20220608_model20220527_meas20220602_pcal2deltal_demonstratedeltalcorrections.pdf.

Just like the function's predecessor, 'calcs_dtt_calibration', let's install the option to export the answer without whitening present.