[FIX] Force name to string (#24930)

* Force name and email to string

If its ever anything but a string.  Like an array for example It borks the user list because of the aggregations done to bring in users

* Removed force to string for email 

Downstream user creation logic handles this so its safe to let go as is

* Log number of values received per attribute

* Allow multiple emails

Co-authored-by: Pierre Lehnen <pierre.lehnen@rocket.chat>