Log if any numerical_distributions will not be applied

[npatki]

Nice to have. We can remove this from the milestone if needed.

Problem Description

In SDV 1.0, I will be able to specify numerical distributions for any original column name:

synthesizer = GaussianCopulaSynthesizer(
  metadata,
  numerical_distributions={
    'age': 'uniform',
    'start_date': 'beta',
    'end_date': 'beta',
  }
)

However (due to constraints and transformations), the column may no longer exist once we hit the fitting stage -- meaning that my specified numerical distribution won't be applied. For example, if I apply an Inequality constraint between start_date and end_date, then start_date may be dropped.

Expected behavior

It would be nice to log that this is happening (logger.info):

After preprocess, we should have a new list of column names. If any user-provided name in numerical_distributions is no longer available, then log it during the fit_processed_data method:

INFO: Requested distribution ('beta') cannot be applied to column ('start_date')
because it no longer exists after preprocessing.