Is there any plan to add C++ AdminClient API

[372046933]

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Description

Currently, only C API support list consumer group offsets and topic earliest/latest offset. But C API usage is quite cumbersome

How to reproduce

<your steps how to reproduce goes here, or remove section if not relevant>

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Checklist

IMPORTANT: We will close issues where the checklist has not been completed.

Please provide the following information:

• librdkafka version v2.6.1
• Apache Kafka version: <REPLACE with e.g., 0.10.2.3>
• librdkafka client configuration: <REPLACE with e.g., message.timeout.ms=123, auto.reset.offset=earliest, ..>
• Operating system: ubuntu 22.04
• Provide logs (with debug=.. as necessary) from librdkafka
• Provide broker log excerpts
• Critical issue