[Sakhi] User is able to do follow-up for Kala Azar patients

[utkarshavni]

• [x] Create a program encounter called "Kala Azar follow-up".
• [x] This will be unplanned encounter.
• [x] If Kala Azar Case Status is death then hide the encounter.

Form requirements: https://docs.google.com/spreadsheets/d/1HMAVYsJzpr23R_fxFmMfoEBpruCHEa1J/edit#gid=1474207435