textproc/elasticsearch7: Update to 7.9.3

Changelog for 7.9.3:

• Bug fixes:
  • Allocation
    • InternalClusterInfoService should not ignore hidden indices
  • Audit
    • Move RestRequestFilter to core
  • Authentication
    • Ensure domain_name setting for AD realm is present
  • Authorization
    • Fix API key role descriptors rewrite bug for upgraded clusters
  • CCR
    • Retry CCR shard follow task when no seed node left
  • Cluster Coordination
    • Uniquely associate term with update task during election
  • EQL
    • Avoid filtering on tiebreakers
    • Fix bug in sequences with any pattern
  • Engine
    • Fix to actually throttle indexing on getting activated
  • Features/Data streams
    • Fix querying a data stream name in index field
  • Features/Ingest
    • Handle error conditions when simulating ingest pipelines with verbosity enabled
    • Make for each processor resistant to field modification
  • Machine Learning
    • Fix online updates with custom rules referencing filters
    • Reset reindexing progress when data frame analytics job resumes with incomplete reindexing
  • SQL
    • Fix exception when using CAST on inexact field
  • Search
    • Async search should retry updates on version conflict
  • Transform
    • Fix possible NPE if transform task has no node assigned
    • Filter null objects from field caps request
• Upgrades:
  • Infra/Packaging
    • Switch bundled JDK back to Oracle JDK

PR: 250602
Submitted by: Juraj Lutter <juraj@lutter.sk>