Merge branch '336-upgrade-fluent-bit-chart' into 'master'

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 ](https://docs.fluentbit.io/manual/administration/buffering-and-storage#filesystem-buffering-to-the-rescue)
  - 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](https://docs.fluentbit.io/manual/pipeline/outputs/elasticsearch) to ensure all logs from cluster will be processed successfully.
- Few [istio related changes to ECK package](https://www.elastic.co/guide/en/cloud-on-k8s/current/k8s-service-mesh-istio.html) to assist with fluent-bit communication reliability.


[Fluent-bit MR](https://repo1.dso.mil/platform-one/big-bang/apps/core/fluentbit/-/merge_requests/12)


[elasticsearch-kibana MR](https://repo1.dso.mil/platform-one/big-bang/apps/core/elasticsearch-kibana/-/merge_requests/34)


Closes #336 #335

See merge request platform-one/big-bang/bigbang!386