[Backport 1.3] Triple audit logging fix (#1995)

[opensearch-trigger-bot]

Backport 68f5624 from #1996

[peternied]

I like this change for 1.3.X, its elegant and compact. However I'd like to get additional votes from the other maintainers. What do y'all think?

[codecov-commenter]

Codecov Report

Merging #2026 (aeaa540) into 1.3 (46fd8a2) will increase coverage by 0.24%.
The diff coverage is 50.00%.

@@             Coverage Diff              @@
##                1.3    #2026      +/-   ##
============================================
+ Coverage     64.41%   64.66%   +0.24%     
+ Complexity     3219     3217       -2     
============================================
  Files           247      247              
  Lines         17356    17350       -6     
  Branches       3074     3087      +13     
============================================
+ Hits          11180    11219      +39     
+ Misses         4625     4582      -43     
+ Partials       1551     1549       -2     

Impacted Files	Coverage Δ
...g/opensearch/security/auditlog/sink/Log4JSink.java	60.00% <50.00%> (+12.00%)	⬆️
...ensearch/security/ssl/DefaultSecurityKeyStore.java	68.93% <0.00%> (-0.15%)	⬇️
...azon/dlic/auth/http/kerberos/util/JaasKrbUtil.java	0.00% <0.00%> (ø)
...a/org/opensearch/security/tools/SecurityAdmin.java	47.59% <0.00%> (+<0.01%)	⬆️
...earch/security/resolver/IndexResolverReplacer.java	63.97% <0.00%> (+0.10%)	⬆️
.../org/opensearch/security/auth/BackendRegistry.java	59.37% <0.00%> (+0.10%)	⬆️
...ch/security/securityconf/DynamicConfigFactory.java	61.18% <0.00%> (+0.25%)	⬆️
...dlic/auth/http/saml/AuthTokenProcessorHandler.java	47.28% <0.00%> (+0.28%)	⬆️
...zon/dlic/auth/ldap2/LDAPAuthorizationBackend2.java	28.73% <0.00%> (+0.37%)	⬆️
.../org/opensearch/security/support/ConfigHelper.java	82.35% <0.00%> (+1.96%)	⬆️
... and 4 more

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[cwperks]

The change looks good to me. 🚢

There are flaky tests in the 1.3 build. I opened an issue earlier today to address build stability issues.