Add additional technical writer feedback to Cluster APIs

[Naarcha-AWS]

This PR adds descriptions for certain enums and array options that exist for Cluster APIs. Also adds defaults where they might not exist, and makes some descriptions more descriptive.

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[github-actions]

Changes Analysis

Commit SHA: 1b9f37c
Comparing To SHA: 5ed668d

API Changes

Summary

├─┬Paths
│ ├─┬/_cluster/health
│ │ └─┬GET
│ │   ├─┬Parameters
│ │   │ └──[➕] description (18289:20)
│ │   ├──Parameters
│ │   ├─┬Parameters
│ │   │ └──[➕] description (18327:20)
│ │   └─┬Parameters
│ │     └─┬Schema
│ │       └──[➕] default (18358:18)❌ 
│ ├─┬/_cluster/settings
│ │ ├─┬GET
│ │ │ └─┬Parameters
│ │ │   └──[➕] description (18228:20)
│ │ └─┬PUT
│ │   └─┬Parameters
│ │     └──[➕] description (18491:20)
│ ├─┬/_cluster/state
│ │ └─┬GET
│ │   └─┬Parameters
│ │     └──[➕] description (18607:20)
│ ├─┬/_cluster/allocation/explain
│ │ ├─┬GET
│ │ │ └─┬Parameters
│ │ │   └──[🔀] description (18084:20)
│ │ └─┬POST
│ │   └─┬Parameters
│ │     └──[🔀] description (18084:20)
│ ├─┬/_component_template/{name}
│ │ ├─┬GET
│ │ │ ├─┬Parameters
│ │ │ │ └──[➕] description (18183:20)
│ │ │ └─┬Parameters
│ │ │   └──[🔀] description (18192:20)
│ │ ├─┬PUT
│ │ │ └─┬Parameters
│ │ │   └──[➕] description (18446:20)
│ │ ├─┬POST
│ │ │ └─┬Parameters
│ │ │   └──[➕] description (18446:20)
│ │ ├─┬DELETE
│ │ │ └─┬Parameters
│ │ │   └──[🔀] description (18102:20)
│ │ └─┬HEAD
│ │   └─┬Parameters
│ │     └──[➕] description (18147:20)
│ ├─┬/_cluster/state/{metric}
│ │ └─┬GET
│ │   └─┬Parameters
│ │     └──[➕] description (18607:20)
│ ├─┬/_cluster/decommission/awareness/{awareness_attribute_name}/{awareness_attribute_value}
│ │ └─┬PUT
│ │   └─┬Parameters
│ │     ├──[🔀] description (18484:20)
│ │     └─┬Schema
│ │       └──[🔀] description (18487:22)
│ ├─┬/_component_template
│ │ └─┬GET
│ │   ├─┬Parameters
│ │   │ └──[➕] description (18183:20)
│ │   └─┬Parameters
│ │     └──[🔀] description (18192:20)
│ ├─┬/_cluster/routing/awareness/{attribute}/weights
│ │ └─┬PUT
│ │   └─┬Parameters
│ │     ├──[🔀] description (18522:20)
│ │     └─┬Schema
│ │       └──[🔀] description (18525:22)
│ ├─┬/_cluster/health/{index}
│ │ └─┬GET
│ │   ├─┬Parameters
│ │   │ └──[➕] description (18289:20)
│ │   ├─┬Parameters
│ │   │ └─┬Schema
│ │   │   └──[➕] default (18358:18)❌ 
│ │   ├──Parameters
│ │   └─┬Parameters
│ │     └──[➕] description (18327:20)
│ ├─┬/_cluster/pending_tasks
│ │ └─┬GET
│ │   └─┬Parameters
│ │     └──[➕] description (18378:20)
│ ├─┬/_cluster/state/{metric}/{index}
│ │ └─┬GET
│ │   └─┬Parameters
│ │     └──[➕] description (18607:20)
│ └─┬/_cluster/reroute
│   └─┬POST
│     ├─┬Parameters
│     │ └──[➕] description (18530:20)
│     └─┬Parameters
│       └──[🔀] description (18544:20)
└─┬Components
  ├─┬_common___WaitForEvents
  │ ├──[➖] enum (36768:11)❌ 
  │ ├──[➖] enum (36769:11)❌ 
  │ ├──[➖] enum (36770:11)❌ 
  │ ├──[➖] enum (36771:11)❌ 
  │ ├──[➖] enum (36772:11)❌ 
  │ ├──[➖] enum (36773:11)❌ 
  │ ├──[➖] type (36766:13)❌ 
  │ ├──[➕] oneOf (36783:11)
  │ ├──[➕] oneOf (36786:11)
  │ ├──[➕] oneOf (36789:11)
  │ ├──[➕] oneOf (36792:11)
  │ ├──[➕] oneOf (36795:11)
  │ └──[➕] oneOf (36798:11)
  └─┬cluster.reroute___Metric
    ├──[➖] enum (50838:11)❌ 
    ├──[➖] enum (50840:11)❌ 
    ├──[➖] enum (50841:11)❌ 
    ├──[➖] enum (50844:11)❌ 
    ├──[➖] enum (50846:11)❌ 
    ├──[➖] enum (50839:11)❌ 
    ├──[➖] enum (50842:11)❌ 
    ├──[➖] enum (50843:11)❌ 
    ├──[➖] enum (50845:11)❌ 
    ├──[➖] type (50836:13)❌ 
    ├──[➕] oneOf (50864:11)
    ├──[➕] oneOf (50867:11)
    ├──[➕] oneOf (50870:11)
    ├──[➕] oneOf (50873:11)
    ├──[➕] oneOf (50876:11)
    ├──[➕] oneOf (50879:11)
    ├──[➕] oneOf (50882:11)
    ├──[➕] oneOf (50885:11)
    └──[➕] oneOf (50888:11)

Document Element	Total Changes	Breaking Changes
paths	28	2
components	32	17

• ❌ BREAKING Changes: 19 out of 60
• Modifications: 10
• Removals: 17
• Additions: 33
• Breaking Removals: 17
• Breaking Additions: 2

Report

The full API changes report is available at: https://github.com/opensearch-project/opensearch-api-specification/actions/runs/13550673600/artifacts/2658017533

API Coverage

	Before	After	Δ
Covered (%)	663 (64.94 %)	663 (64.94 %)	0 (0 %)
Uncovered (%)	358 (35.06 %)	358 (35.06 %)	0 (0 %)
Unknown	45	45	0

[github-actions]

Spec Test Coverage Analysis

Total	Tested
595	593 (99.66 %)

[Naarcha-AWS]

Adding Missing Defaults and changing enums to OneOf are not breaking changes, since the enums already existed as strings and the missing default already exists. Let me know if I need to tweak anything else though.