[DOC] New dynamic settings introduced in OpenSearch PR #15986

[sumitasr]

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Documentation changes for 3 new dynamic settings:

• cat.indices.response.limit.number_of_indices
  Response limit in _cat/indices API and limit will be applied on number of indices.
• cat.shards.response.limit.number_of_shards
  Response limit in _cat/shards API and limit will be applied on number of shards.
• cat.segments.response.limit.number_of_indices
  Response limit in _cat/segments API and limit will be applied on number of indices.

*Version: 2.18 and above

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opensearch-project/OpenSearch#15986