Werk #15434: agent: return better respones for GET collection

Component	REST API
Title	agent: return better respones for GET collection
Date	Mar 8, 2023
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.3.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.3.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.2.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.1.0p25 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Previously when calling the agent GET collection endpoint, the value attribute would only contain the following information for each agent

{
    "domainType": "dict",
    "title": "e660531752c87c6c"
}

It now contains the following

{
    'domainType': 'agent',
    'extensions': {},
    'id': 'a3e050556d2455c2',
    'links': [
        {
            'domainType': 'link',
            'href': 'http://localhost/heute/check_mk/api/1.0/objects/agent/a3e050556d2455c2',
            'method': 'GET',
            'rel': 'self',
            'type': 'application/json'
        }
    ],
    'members': {},
    'title': 'Agent a3e050556d2455c2'
}

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