collect gateway type and version with usage reporting

We can show the customers which router versions they are using. The information can be sent to the usage reporting service via a HTTP header `x-hive-gateway-name` and `x-hive-gateway-version`.

Some possible values for `x-hive-gateway-name`:
- `apollo-gateway`
- `apollo-router`
- `hive-gateway`
- `hive-router`
- `grafbase-router`

The data should be ingested into Clickhouse and it should be possible to filter data on the insights page based on that, as well as display which gateway versions are in use.