sysutils/beats7: Update to 7.9.2

Changes since 7.9.1:

• Breaking changes
  • Affecting all Beats
    • Autodiscover doesn’t generate any configuration when a variable is missing. Previously it generated an incomplete configuration.
• Bugfixes
  • Affecting all Beats
    • Explicitly detect missing variables in autodiscover configuration, log them at the debug level.
    • Fix libbeat.output.write.bytes and libbeat.output.read.bytes metrics of the Elasticsearch output.
  • Filebeat
    • Provide backwards compatibility for the set processor when Elasticsearch is less than 7.9.0.
    • Fix an error updating file size being logged when EOF is reached.
    • Fix error when processing AWS Cloudtrail Digest logs.
  • Metricbeat
    • The Kibana collector applies backoff when errored at getting usage stats
    • The elasticsearch/index metricset only requests wildcard expansion for hidden indices if the monitored Elasticsearch cluster supports it.
    • Fix panic index out of range error when getting AWS account name.
    • Handle missing counters in the application_pool metricset.
  • Functionbeat
    • Do not need Google credentials if not required for the operation.
    • Fix dependency issues of GCP functions.
• Added
  • Affecting all Beats
    • Add container ECS fields in kubernetes metadata.

FreeBSD notes:

• Fixed PRs:
  • bug #248499
  • bug #244627
  • bug #228785
• Fix paths in various (mostly example) files

Release Notes:
https://www.elastic.co/guide/en/beats/libbeat/current/release-notes-7.9.2.html

PR: 249912
Submitted by: Juraj Lutter <juraj@lutter.sk>