InfluxDB 2: Cannot find owner of TelegrafConfig

```bash
# Create TelegrafConfig
--> POST http://127.0.0.1:9999/api/v2/telegrafs
--> {
"name": "tc1605171465258-IT",
"description": "test-config",
"config": "[agent]\n interval = \"10s\"\n round_interval = true\n metric_batch_size = 1000\n metric_buffer_limit = 10000\n collection_jitter = \"0s\"\n flush_jitter = \"0s\"\n precision = \"\"\n omit_hostname = false\n\n#my instance\n[[outputs.influxdb_v2]]\n bucket = \"my-bucket\"\n urls = [\"http://127.0.0.1:9999\"]\n organization = \"my-org\"\n token = \"$INFLUX_TOKEN\"\n[[inputs.cpu]]\n totalcpu = true\n collect_cpu_time = false\n report_active = false\n percpu = true\n",
"orgID": "cf6cf88984580114"
}
<-- 201 Created http://127.0.0.1:9999/api/v2/telegrafs

### Find owners
--> GET http://127.0.0.1:9999/api/v2/telegrafs/069aea8c16a7c000/owners
<-- 200 OK http://127.0.0.1:9999/api/v2/telegrafs/069aea8c16a7c000/owners
<-- {"links":{"self":"/api/v2/telegrafs/069aea8c16a7c000/owners"},"users":[]}
```

__Steps to reproduce:__
List the minimal actions needed to reproduce the behavior.

1. Create TelegrafConfig
2. List owners of TelegrafConfig

__Expected behavior:__
Return list with owner - user who created the TelegrafConfig

__Actual behavior:__
Return empty list.

__Environment info:__

* InfluxDB version: InfluxDB v2 nightly from 2020-11-12

Start by reproducing the POST /api/v2/telegrafs request followed by GET /api/v2/telegrafs/{id}/owners described in the issue. Trace the TelegrafConfig ownership handling and verify that the owners response includes the user who created the configuration.

Written by the indexing model from the issue text.