[Backport 2.0] Change auto expand replicas to 0-2

[opensearch-trigger-bot]

Backport e0a3052 from #1186

[codecov-commenter]

Codecov Report

Merging #1189 (e93c315) into 2.0 (46d0de9) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##                2.0    #1189   +/-   ##
=========================================
  Coverage     59.22%   59.22%           
  Complexity      283      283           
=========================================
  Files           238      238           
  Lines          7825     7825           
  Branches       1620     1577   -43     
=========================================
  Hits           4634     4634           
- Misses         3017     3019    +2     
+ Partials        174      172    -2     

Flag	Coverage Δ
dashboards-observability	52.61% <ø> (ø)
opensearch-observability	76.60% <ø> (ø)

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Impacted Files	Coverage Δ
...mponents/event_analytics/hooks/use_fetch_events.ts	1.29% <0.00%> (ø)

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