[2.3.0] Checkmk Werk 16435 created: agent_netapp_ontap: Fix TypeError for SnapVault

[//]: # (werk v2) # agent_netapp_ontap: Fix TypeError for SnapVault key | value ---------- | --- date | 2024-06-26T11:18:02+00:00 version | 2.3.0p8 class | fix edition | cre component | checks level | 1 compatible | yes Previously, `agent_netapp_ontap` would crash if the API returned any `SnapMirror` objects: ``` File "/omd/sites/mysite/local/lib/python3/cmk/special_agents/agent_netapp_ontap.py", line 827, in write_sections write_section("snapvault", fetch_snapmirror(connection), logger) File "/omd/sites/mysite/local/lib/python3/cmk/special_agents/agent_netapp_ontap.py", line 32, in write_section writer.append_json(element.model_dump(exclude_unset=True, exclude_none=False)) File "/omd/sites/mysite/lib/python3/cmk/special_agents/v0_unstable/agent_common.py", line 62, in append_json self.writeline(json.dumps(data, sort_keys=True)) File "/omd/sites/mysite/lib/python3.12/json/__init__.py", line 238, in dumps **kw).encode(obj) File "/omd/sites/mysite/lib/python3.12/json/encoder.py", line 200, in encode chunks = self.iterencode(o, _one_shot=True) File "/omd/sites/mysite/lib/python3.12/json/encoder.py", line 258, in iterencode return _iterencode(o, 0) File "/omd/sites/mysite/lib/python3.12/json/encoder.py", line 180, in default raise TypeError(f'Object of type {o.__class__.__name__} ' ```