Get Available Screen Fields
GET {{baseUrl}}/rest/api/3/screens/:screenId/availableFields
Returns the fields that can be added to a tab on a screen.
Permissions required: Administer Jira global permission.
RESPONSES
status: OK
[{"id":"quis nisi","name":"commodo ea aliqua aute"},{"id":"in occaecat sunt","name":"culpa eu do"}]