This ticket is created as a followup of #3451
The rename processor (renaming message to event.original) in the ingest pipelines for log datastreams don't have an if/ignore_missing check

Current state:

• rename:
  field: message
  target_field: event.original

Expected State:

• rename:
  field: message
  target_field: event.original
  ignore_missing: true
  if: 'ctx.event?.original == null'
  description: 'Renames the original message field to event.original to store a copy of the original message. The event.original field is not touched if the document already has one; it may happen when Logstash sends the document.'

Below are the Observability Integrations which need this change

Phase1 updates:

• apache Add null checks and ignore_missing checks to the rename processor #7845
• apache_tomcat Add null checks and ignore_missing checks to the rename processor #7845
• cassandra Add null checks and ignore_missing checks to the rename processor #7845
• ceph Add null checks and ignore_missing checks to the rename processor #7845
• citrix_adc Add null checks and ignore_missing checks to the rename processor #7845
• golang Add null checks and ignore_missing checks to the rename processor #7845
• hadoop Add null checks and ignore_missing checks to the rename processor #7845
• haproxy Add null checks and ignore_missing checks to the rename processor #7845
• iis Add null checks and ignore_missing checks to the rename processor #7845
• kafka Add null checks and ignore_missing checks to the rename processor #7845
• microsoft_sqlserver Add null checks and ignore_missing checks to the rename processor #7845
• nginx Add null checks and ignore_missing checks to the rename processor #7845
• oracle Add null checks and ignore_missing checks to the rename processor #7845
• oracle_weblogic Add null checks and ignore_missing checks to the rename processor #7845
• php_fpm Add null checks and ignore_missing checks to the rename processor #7845
• postgresql Add null checks and ignore_missing checks to the rename processor #7845
• rabbitmq Add null checks and ignore_missing checks to the rename processor #7845
• redis Add null checks and ignore_missing checks to the rename processor #7845
• traefik Add null checks and ignore_missing checks to the rename processor #7845
• nagios_xi Add null checks and ignore_missing checks to the rename processor #7845

Cloud Monitoring:

• aws [AWS] Add the ignore_missing and null checks to rename processor #7933
• azure_frontdoor [Azure] Update null checks and if checks in the rename processor #7953
• gcp [GCP] Update null checks and if checks in the rename #7934

Cloud Native:

• istio [Cloudnative] Update null checks and if checks in the rename processor #7956
• nats [Cloudnative] Update null checks and if checks in the rename processor #7956
• nginx_ingress_controller [Cloudnative] Update null checks and if checks in the rename processor #7956
• stan [Cloudnative] Update null checks and if checks in the rename processor #7956

Phase2 updates:

• activemq Add null and ignore_missing check to handle event.original field. #8624
• coredns Add null and ignore_missing check to handle event.original field. #8624
• ibmmq Add null and ignore_missing check to handle event.original field. #8624
• mongodb Add null and ignore_missing check to handle event.original field. #8624
• mysql [Mysql] Add support for tags, processors & preserve_original_event #8626
• salesforce Add null and ignore_missing check to handle event.original field. #8624
• spring_boot Add null and ignore_missing check to handle event.original field. #8624
  - [ ] tomcat Will soon be deprecated.
• vsphere Add null and ignore_missing check to handle event.original field. #8624