Rename Index Prefix for Data Sent to Elasticsearch

Currently, we have Logstash_Format enabled for the fluentbit settings with no prefix set so the indexes for data show "logstash-YYY.MM.DD" even though we are not utilizing Logstash directly.

Fluentbit configuration allows for setting "Logstash_Prefix" to update this name:

https://docs.fluentbit.io/manual/pipeline/outputs/elasticsearch