Fix json format of audit command missing affectedVersions, fix reportedAt format (BC BREAK!)

[Seldaek]

Fixes #11104

This fixes the affectedVersions missing from the output, but also changes the reportedAt output from

                "reportedAt": {
                    "date": "2022-02-04 06:52:21.000000",
                    "timezone_type": 3,
                    "timezone": "UTC"
                },

to "reportedAt": "2022-02-04T06:52:21+00:00"

This is strictly speaking a BC break but the old format was kinda garbage so I think we rather fix this now while it's still early. It's an easy fix anyway and should trigger hard failures for anyone accessing the reportedAt>date field so it shouldn't get missed.