Honor log_request_body setiing in compliance audit log

[cwperks]

Description

This PR ensures that the value of log_request_body is honored for the compliance logging. When using the compliance config, this PR will ensure that the document's source is audit logged in the audit_request_body when a document is first created, but otherwise it will not. When write_log_diffs is enabled, you can trace the full history of changes to documents on the tracked indices by looking for all events on the target index.

By default, the security index gets events audit logged so Compliant logging is a good feature to use to trace changes to the security configuration.

• Category (Enhancement, New feature, Bug fix, Test fix, Refactoring, Maintenance, Documentation)

Enhancement

Issues Resolved

#4534

Check List

• New functionality includes testing
• New functionality has been documented
• New Roles/Permissions have a corresponding security dashboards plugin PR
• API changes companion pull request created
• Commits are signed per the DCO using --signoff

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[codecov]

Codecov Report

Attention: Patch coverage is 55.55556% with 4 lines in your changes missing coverage. Please review.

Project coverage is 70.76%. Comparing base (703d40f) to head (3ed22ae).
Report is 11 commits behind head on main.

Files with missing lines	Patch %	Lines
...earch/security/auditlog/impl/AbstractAuditLog.java	55.55%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4832      +/-   ##
==========================================
- Coverage   70.99%   70.76%   -0.23%     
==========================================
  Files         310      310              
  Lines       20938    20952      +14     
  Branches     3326     3333       +7     
==========================================
- Hits        14865    14827      -38     
- Misses       4325     4376      +51     
- Partials     1748     1749       +1     

Files with missing lines	Coverage Δ
...earch/security/auditlog/impl/AbstractAuditLog.java	76.51% <55.55%> (-0.12%)	⬇️

... and 17 files with indirect coverage changes