[Backport 2.4] Adding index template permissions to kibana_server role

[opensearch-trigger-bot]

Backport fb70a75 from #2503

[codecov-commenter]

Codecov Report

Merging #2511 (7d78d7c) into 2.4 (7410ea7) will increase coverage by 0.07%.
The diff coverage is n/a.

📣 This organization is not using Codecov’s GitHub App Integration. We recommend you install it so Codecov can continue to function properly for your repositories. Learn more

@@             Coverage Diff              @@
##                2.4    #2511      +/-   ##
============================================
+ Coverage     61.07%   61.15%   +0.07%     
- Complexity     3252     3257       +5     
============================================
  Files           258      258              
  Lines         18131    18131              
  Branches       3232     3232              
============================================
+ Hits          11074    11088      +14     
+ Misses         5485     5471      -14     
  Partials       1572     1572              

Impacted Files	Coverage Δ
...security/auditlog/sink/ExternalOpenSearchSink.java	61.72% <0.00%> (+2.46%)	⬆️
...ic/auth/http/jwt/AbstractHTTPJwtAuthenticator.java	59.30% <0.00%> (+3.48%)	⬆️
.../auth/http/jwt/keybyoidc/SelfRefreshingKeySet.java	63.38% <0.00%> (+3.52%)	⬆️
...ch/security/auditlog/routing/AsyncStoragePool.java	55.55% <0.00%> (+5.55%)	⬆️
...t/keybyoidc/AuthenticatorUnavailableException.java	20.00% <0.00%> (+20.00%)	⬆️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.