[Backport main] fix for mappings of custom log types & other bug fixes

[opensearch-trigger-bot]

Backport 745874d from #505

[codecov]

Codecov Report

Merging #528 (ec62f2d) into main (66664b4) will decrease coverage by 0.09%.
The diff coverage is 4.79%.

@@             Coverage Diff              @@
##               main     #528      +/-   ##
============================================
- Coverage     25.91%   25.83%   -0.09%     
- Complexity      941      942       +1     
============================================
  Files           252      252              
  Lines         10683    10735      +52     
  Branches       1187     1197      +10     
============================================
+ Hits           2769     2773       +4     
- Misses         7666     7715      +49     
+ Partials        248      247       -1     

Files Changed	Coverage Δ
...ityanalytics/action/IndexCustomLogTypeRequest.java	0.00% <0.00%> (ø)
...search/securityanalytics/mapper/MapperService.java	0.00% <0.00%> (ø)
.../transport/TransportDeleteCustomLogTypeAction.java	0.00% <0.00%> (ø)
...s/transport/TransportIndexCustomLogTypeAction.java	0.00% <0.00%> (ø)
...tics/transport/TransportListCorrelationAction.java	0.00% <0.00%> (ø)
...arch/securityanalytics/logtype/LogTypeService.java	40.29% <100.00%> (+0.14%)	⬆️

... and 2 files with indirect coverage changes