Modify Tag in Lua Filter

**Describe the solution you'd like**
Currently there is no way to modify an existing tag. If the lua filter allowed you to return the tag that if modified based on logic it would fix our problem. You could create a new tag using a stream but we already use lua for a bunch of other logic and would be nice to allow it there as well to give options.

**Describe alternatives you've considered**
Create a new steam based on a where clause to tag logs differently based on a field.