[php-src] Issue #13067: date_sun_info restore ability to supply custom zenith value

Issue: https://github.com/php/php-src/issues/13067 Author: Alvamiga ### Description The old functions (date_sunrise and date_sunset, now marked as deprecated) had the option to use a custom zenith. The ability has been lost in the replacement date_sun_info function, only supporting a few, standard, fixed values. While the supplied standards are useful, it stills has purpose to be able to set a custom value for the zenith, as before. Could this be added as an optional parameter and return an additional pair of keys in the returned array?