Determine all the data types which are being used for generation

[brdandu]

From project-chip/connectedhomeip#26016 (comment)
I guess future zap feature request: we should be able to iterate over "used" structures and types (enums, bitmaps etc) (and this should be recursive: if a struct uses a struct that uses an enum, I should see 2 structs and an enum)

This will most probably start with the data types from enabled attributes and command(command argument types) and then do a recursive type enablement based on that.