Estimate the total_byte_size of the filter expression's result when selectivity is available

[isidentical]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.
FilterExec can estimate the total_byte_size (as it is estimating the number of rows) when selectivity is available to us.

Describe the solution you'd like
Normalize the total_byte_size by that filter predicate's selectivity to obtain the estimated number of result bytes.

Describe alternatives you've considered
None

Additional context
Originally from @mingmwang at #4372 (comment)