[Feature]: restrict biology output using the use_morph(g) flag

[Rick-Methot-NOAA]

Describe the solution you would like.

Some biology tables, particularly natural_mortality, are showing output of 0's for some biological cohorts. This can be filtered out by use of use_morph(g). Noticed this while working with a setup involving many bio entities

Describe alternatives you have considered

continuing to be annoyed by seeing this useless portions of tables

Statistical validity, if applicable

NA

Describe if this is needed for a management application

no

Additional context

No response