Updates to reflect latest changes to API

[malikkotob]

As an agency, in order to receive FOIA requests via API, I need updates made to reflect the latest changes to the API.

Acceptance criteria

• A confirmation_id field is added (this corresponds to the ID returned to the requester when submitting a FOIA request)
• A removed_files field is added
• The "Sample Payload" is updated to include these fields
• The "Sample Request" is updated to include these fields
• The wording on the confirmation page a requester receives upon submission is updated such that "submission ID" is "confirmation ID"

Implementation details

Confirmation ID

Field:	confirmation_id
Type:	integer
Description:	The unique confirmation ID sent to the requester upon successful submission of a FOIA request.
Required:	yes
Example:	3123

Removed Files

Field:	removed_files
Type:	array
Description:	Documents or attachments provided by the requester that were stripped from the request after being flagged as having a virus.
Required:	no
Example:	["file-with-virus-1.txt","file-with-virus-2.txt"]

Current Confirmation Page