[2.x] React to Strings changes from #9103 in core

[cwperks]

Backport of #3110 to 2.x

[codecov]

Codecov Report

Merging #3111 (3b52d9b) into 2.x (159698f) will decrease coverage by 0.05%.
The diff coverage is 28.57%.

@@             Coverage Diff              @@
##                2.x    #3111      +/-   ##
============================================
- Coverage     62.22%   62.18%   -0.05%     
+ Complexity     3313     3311       -2     
============================================
  Files           265      265              
  Lines         19494    19496       +2     
  Branches       3328     3328              
============================================
- Hits          12130    12123       -7     
- Misses         5739     5742       +3     
- Partials       1625     1631       +6     

Files Changed	Coverage Δ
...nsearch/security/action/whoami/WhoAmIResponse.java	0.00% <0.00%> (ø)
...search/security/auditlog/impl/RequestResolver.java	67.75% <0.00%> (ø)
...search/security/configuration/DlsFlsValveImpl.java	59.23% <0.00%> (-0.42%)	⬇️
...a/org/opensearch/security/tools/SecurityAdmin.java	41.37% <0.00%> (ø)
...earch/security/auditlog/impl/AbstractAuditLog.java	76.43% <50.00%> (ø)
...pensearch/security/auditlog/impl/AuditMessage.java	74.00% <100.00%> (ø)
...ecurity/configuration/ConfigurationRepository.java	72.28% <100.00%> (ø)

... and 5 files with indirect coverage changes