[APIView] Track Swagger APIView usage

- ARM team doesn't use it
- Is data plane using it? we can look at the numbers according to the past 2 months of reviews
- Is our team using it? (Shanghai?)

Start by reviewing APIView review data from the past two months and determine whether the data plane, ARM team, and the Shanghai team use it. Done means documenting usage findings for each group; the issue does not name files, tests, or an implementation entry point.

Written by the indexing model from the issue text.