fix(server): Use immutable nodes only when multicore >= 200
fix(server): Use immutable nodes only when multicore >= 200

StalderT/open62541,open62541/open62541,JGrothoff/open62541,StalderT/open62541,StalderT/open62541,jpfr/open62541,JGrothoff/open62541,jpfr/open62541,StalderT/open62541,open62541/open62541,jpfr/open62541,jpfr/open62541,open62541/open62541,JGrothoff/open62541,JGrothoff/open62541,open62541/open62541