Upgrade Fluent-Bit Chart to 0.15.3 and Elasticsearch Chart to 0.1.7-bb.0

Summary

• Updating Fluent-bit to upstream chart version 0.15.3, image version 1.7.2.
• Updating fluent-bit configuration with production ready settings to greatly increase reliability of log ingestion within stack.
  • Adding filesystem buffering
  • Switching to containerd parser instead of Docker.
  • Excluding fluent-bit, and gatekeeper-audit (captured by opa-collector) container logs by default.
  • Adding separate tags for kube and system INPUT logs.
  • Replace_Dots setting in Elasticsearch Output to ensure all logs from cluster will be processed successfully.
• Few istio related changes to ECK package to assist with fluent-bit communication reliability.

Fluent-bit MR

elasticsearch-kibana MR

Closes #336 (closed) #335 (closed)