Update chart to utilize upstream helm chart

Following structure of other packages, pointing to upstream helm chart will allow more options and flexibility. https://github.com/fluent/helm-charts/tree/master/charts/fluent-bit

assigned to @ryan.j.garcia

https://repo1.dso.mil/platform-one/big-bang/apps/core/fluentbit/-/merge_requests/7

mentioned in merge request !7 (merged)

Closing as above MR has been merged into package.

closed