KC: Support First-class offsets in Kafka Connect

[Haarolean]

From provectus/kafka-ui#4289

Describe the feature you're interested in

KIP-875 just debuted on Kafka 3.6 and it would be great to be able to leverage this feature using the UI

Provides first-class admin support for offsets in Kafka Connect. KIP-875 Part 1 added endpoints to get offsets and a new STOPPED state for connectors. The alter offsets and reset offsets endpoints have now been added.

Action	Description
GET /connectors/{connector}/offsets	Retrieve the offsets for a connector; the connector must exist
PATCH /connectors/{connector}/offsets	Alter the offsets for a connector; the connector must exist, and must be in the STOPPED state
DELETE /connectors/{connector}/offsets	Reset the offsets for a connector; the connector must exist, and must be in the STOPPED state
PUT /connectors/{connector}/pause	Pause the connector; the connector must exist

[Haarolean]

• KIP-875: First-class offsets support in Kafka Connect provectus/kafka-ui#4289 (comment)