Remove personal information from view/download data and exports

[joycarpediem]

This is a backlog item. Do not work on it till it has been moved to dev tasks . Logging in here first because Asana is currently down

Possible implementation

• Mark questions as PII in flow (functionality already exists
• Create migration , if required, in SIWINS to store this flag
• Use this flag to filter data in the endpoint

[wayangalihpratama]

https://app.asana.com/0/1204193430573075/1205239719970345