Issue Description: The user should be able to retrieve the detail of a source connector from the RHOSE api

Acceptance Criteria: The endpoint GET /api/smartevents_mgmt/v2/bridges/{bridgeId}/sources/{sourceId} is exposed from the control plane and it returns the details (including the status of the resource) of the source connector to the Bridge {bridgeId}.

Out of Scope: <Here you need to fill in what is out of scope for this issue and then create new issues if necessary in the backlog for the work>

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