[Backport 2.x] Making shard copy count a multiple of attribute count (#3462)

[gbbafna]

• Making all copies a multiple of attribute count

Signed-off-by: Gaurav Bafna gbbafna@amazon.com
(cherry picked from commit 82ff463)

Description

[Describe what this change achieves]

Issues Resolved

[List any issues this PR will resolve]

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed per the DCO using --signoff

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[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: SUCCESS ✅
• URL: https://build.ci.opensearch.org/job/gradle-check/1248/
• CommitID: 25633be

[codecov-commenter]

Codecov Report

Merging #4086 (25633be) into 2.x (517b815) will decrease coverage by 0.14%.
The diff coverage is 71.23%.

@@             Coverage Diff              @@
##                2.x    #4086      +/-   ##
============================================
- Coverage     70.61%   70.46%   -0.15%     
+ Complexity    56628    56544      -84     
============================================
  Files          4543     4544       +1     
  Lines        272332   272403      +71     
  Branches      40017    40027      +10     
============================================
- Hits         192307   191953     -354     
- Misses        63902    64288     +386     
- Partials      16123    16162      +39     

Impacted Files	Coverage Δ
...rg/opensearch/common/settings/ClusterSettings.java	91.89% <ø> (ø)
...a/org/opensearch/test/OpenSearchIntegTestCase.java	56.48% <0.00%> (-0.50%)	⬇️
...luster/metadata/MetadataUpdateSettingsService.java	70.49% <37.50%> (-0.94%)	⬇️
...er/routing/allocation/AwarenessReplicaBalance.java	97.14% <97.14%> (ø)
...h/cluster/metadata/MetadataCreateIndexService.java	77.30% <100.00%> (+0.19%)	⬆️
...cluster/metadata/MetadataIndexTemplateService.java	81.68% <100.00%> (-1.27%)	⬇️
server/src/main/java/org/opensearch/node/Node.java	85.96% <100.00%> (+0.06%)	⬆️
...java/org/opensearch/client/indices/DataStream.java	0.00% <0.00%> (-76.09%)	⬇️
.../opensearch/client/indices/CloseIndexResponse.java	17.50% <0.00%> (-73.75%)	⬇️
.../java/org/opensearch/node/NodeClosedException.java	50.00% <0.00%> (-50.00%)	⬇️
... and 499 more

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