[2.3.0] Checkmk Werk 16170 created: snmp: Store OID cache per context group

[//]: # (werk v2) # snmp: Store OID cache per context group key | value ---------- | --- compatible | yes version | 2.3.0b1 date | 2024-02-07T09:54:40+00:00 level | 1 class | fix component | checks edition | cre SNMP caching didn't take contexts in consideration when storing OID data. This led to the same result being reported for the OID in different sections even if sections use different contexts. Now, SNMP caching stores fetched OID data for every group of contexts it was called with.