Allow general `gmix` objects for `ngmix_catalogs`

[sweverett]

ngmix_catalog is currently restricted to cm, mof_cm, and gauss for historical reasons. But with needing bdf for Run2, we should update the Balrog input type to use ngmix tools that easily allow the use of any gmix type.

[sweverett]

NB: As part of this rework, we should remove mof as an explicit gmix type, as this is instead a mode of fitting for gmix profiles. What was previously referred to as mof is really cm that was fitted with the MOF algorithm. Any of the profiles could have been fit with MOF instead of SOF. This will simplify things downstream as we previously had to keep track of the mismatch between mof and the col prefix cm, which will no longer be needed.