Add allocation decider for mixed cluster

[ltaragi]

Description

A new allocation decider for migration of document replication clusters to remote store backed clusters

• For STRICT compatibility mode, the decision is always YES
• For remote_store_enabled indices, relocation or allocation/relocation can only be towards a remote node
• For REMOTE_STORE migration direction:
  • New primary shards can only be allocated to a remote node
  • New replica shards can be allocated to a remote node iff the primary has been migrated/allocated to a remote node

Related Issues

As part of #12518

Check List

• New functionality includes testing.
• All tests pass
• New functionality has been documented.
• New functionality has javadoc added
• Failing checks are inspected and point to the corresponding known issue(s) (See: Troubleshooting Failing Builds)
• Commits are signed per the DCO using --signoff
• Commit changes are listed out in CHANGELOG.md file (See: Changelog)
• Public documentation issue/PR created

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[github-actions]

❌ Gradle check result for bfa399c: FAILURE

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[github-actions]

Compatibility status:

Checks if related components are compatible with change 20f5207

Incompatible components

Skipped components

Compatible components

Compatible components: [https://github.com/opensearch-project/asynchronous-search.git, https://github.com/opensearch-project/performance-analyzer-rca.git, https://github.com/opensearch-project/cross-cluster-replication.git, https://github.com/opensearch-project/job-scheduler.git, https://github.com/opensearch-project/reporting.git, https://github.com/opensearch-project/security.git, https://github.com/opensearch-project/performance-analyzer.git, https://github.com/opensearch-project/geospatial.git, https://github.com/opensearch-project/custom-codecs.git, https://github.com/opensearch-project/k-nn.git, https://github.com/opensearch-project/common-utils.git, https://github.com/opensearch-project/flow-framework.git, https://github.com/opensearch-project/observability.git, https://github.com/opensearch-project/anomaly-detection.git, https://github.com/opensearch-project/index-management.git, https://github.com/opensearch-project/opensearch-oci-object-storage.git, https://github.com/opensearch-project/ml-commons.git, https://github.com/opensearch-project/neural-search.git, https://github.com/opensearch-project/notifications.git, https://github.com/opensearch-project/alerting.git, https://github.com/opensearch-project/security-analytics.git, https://github.com/opensearch-project/sql.git]

[github-actions]

❌ Gradle check result for 9fc1b0f: FAILURE

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❌ Gradle check result for b68ec88: FAILURE

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[github-actions]

❌ Gradle check result for 87f2ce7: FAILURE

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[github-actions]

❌ Gradle check result for 3de0a79: FAILURE

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[gbbafna]

Gave 1 pass . Will review IT and UT later .

[github-actions]

❌ Gradle check result for b98b0bd: FAILURE

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[github-actions]

❌ Gradle check result for 689f2f6: FAILURE

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❌ Gradle check result for 194aba3: FAILURE

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[github-actions]

✅ Gradle check result for 20f5207: SUCCESS

[codecov]

Codecov Report

Attention: Patch coverage is 77.55102% with 11 lines in your changes are missing coverage. Please review.

Project coverage is 71.47%. Comparing base (b15cb0c) to head (20f5207).
Report is 35 commits behind head on main.

Files	Patch %	Lines
...decider/RemoteStoreMigrationAllocationDecider.java	76.59%	7 Missing and 4 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #12505      +/-   ##
============================================
+ Coverage     71.42%   71.47%   +0.05%     
- Complexity    59978    60089     +111     
============================================
  Files          4985     4990       +5     
  Lines        282275   282625     +350     
  Branches      40946    40996      +50     
============================================
+ Hits         201603   202000     +397     
+ Misses        63999    63849     -150     
- Partials      16673    16776     +103     

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