Harvest should allow exporting metrics without a prefix

[cgrinds]

          hello @cgrinds - since the rightside is not defined below - How can i use the metric "cassandra_clientrequest_casread_percentile "with out prefix "storagegrid "

Requiremenet : i want to display the metric name with out storage grid prefix

Example : name: Prometheuscassandra query: prometheus object: storagegrid

schedule:

• data: 3m

counters:

• cassandra_clientrequest_casread_percentile

plugins:

• JoinRest

Originally posted by @Bhagyasri-Dolly in https://github.com/NetApp/harvest/issues/1718#issuecomment-2194415561