Account for individual Gateways configuration in telemetry reports

[czeslavo]

Problem statement

KIC uses a phone home mechanism through anonymous reports (relevant CLI flag is called: anonymous-reports).

This only takes into account 1 Kong instance that KIC is configuring. Hence each time a report is being prepared it calls out to Admin API client's Root() call. Currently, there's a validation check in place that ensures that all Gateways that KIC configures use the same Kong version and dbmode.

When KIC will start supporting configuring multiple Gateways with heterogenous versions and/or dbmodes, we should account for all the configured Gateways in the telemetry reports.

Blocked by #3590.

Acceptance criteria

• db and kv values in the telemetry report work with multiple gateways with non-homogenous versions and/or dbmodes