fix: use version 4 of DescribeGroupsRequest only if kafka broker vers… …ion is >= 2.4

[faillefer]

Fixes issue #2443

[dnwe]

@faillefer thanks, we'd also need to update this check here and here for the request + response required versions, which seems to be completely wrong at the moment.

The DescribeGroups protocol is interesting as the request format doesn't change very much between versions, but the response does. We should be supporting and submitting this set of versions:

	1.1	2.0	2.1	2.2	2.3	2.4
DescribeGroups	v1	v2	v2	v2	v3	v4*

• we should really be v5 on 2.4+, but to do that we'd need to implement compact and tagged field on this protocol and we haven't done that yet — v4 is the highest version that doesn't require that

[faillefer]

I have updated both files. It's unclear to me if those versions apply both on Request and Response. I've checked the code in the kafka repository and it seems to be the case for v3 and v4 but i have no idea if it's also the case for other releases

[dnwe]

Thanks, LGTM