luaSurface:*_entities_filtered check for not_on_map flag

[Nexela]

Humbly requesting that find/count_entities_filtered have an additional optional parameter exclude_not_on_map = boolean
When true the array of entities returned would not contain any entities with the not-on-map flag.
When false or nil no affect.

Hmmm seems entity and tile ghost are flagged as not-on-map so this might not help too much

Use Case:
Nanobots does a find_entities_filtered search. The area it checks is relativly small and in most cases completes very quickly However in areas with lots of smoke/fire (steam engine arrays etc) There is a a LOT more stuff to check.
Using a limit won't work If all the find returns is smoke then I won't have a list of entities I am looking for.
Using a force won't work as I scan for stuff marked for deconstruction and somethings don't have a force (trees/rocks etc)
Doing an entity.has_flag check does give me some substantial performance improvements. However I think this could be even more greatly improved if the data returned was even smaller.



Alternatively being able to filter on flags in general would be awesome include_flags={} if present only include entities with these flags, and exlude_flags={} if present exclude entities with these flags

Thank you for looking into this and letting me know your thoughts!