[Backport 2.1] Adding index template permissions to kibana_server role

[opensearch-trigger-bot]

Backport fb70a75 from #2503

[codecov-commenter]

Codecov Report

Merging #2515 (6c92c17) into 2.1 (f484e1a) will decrease coverage by 0.02%.
The diff coverage is n/a.

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@@             Coverage Diff              @@
##                2.1    #2515      +/-   ##
============================================
- Coverage     61.02%   61.01%   -0.02%     
- Complexity     3234     3235       +1     
============================================
  Files           256      256              
  Lines         18088    18088              
  Branches       3224     3224              
============================================
- Hits          11039    11036       -3     
- Misses         5466     5470       +4     
+ Partials       1583     1582       -1     

Impacted Files	Coverage Δ
...ecurity/configuration/StaticResourceException.java	0.00% <0.00%> (-25.00%)	⬇️
...nsearch/security/dlic/rest/api/AuditApiAction.java	63.82% <0.00%> (-4.26%)	⬇️
...security/auditlog/sink/ExternalOpenSearchSink.java	59.25% <0.00%> (-2.47%)	⬇️
...a/org/opensearch/security/tools/SecurityAdmin.java	37.56% <0.00%> (+0.24%)	⬆️
...search/security/transport/SecurityInterceptor.java	76.15% <0.00%> (+0.76%)	⬆️

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