[2.3.0] Checkmk Werk 16800 created: Fix crash in SNMPv1 and SNMPv2 connection tests

[//]: # (werk v2) # Fix crash in SNMPv1 and SNMPv2 connection tests key | value ---------- | --- date | 2024-04-19T15:28:03+00:00 version | 2.3.0b6 class | fix edition | cre component | wato level | 1 compatible | yes When running the SNMP connection tests for a host that has SNMPv3 credentials configured, the SNMPv1 and SNMPv2 connection tests crashed. With the Inline SNMP backend, the corresponding error message read "argument 2 must be str, not tuple". With the Classic backend, there was no error message at all.