Add static method to expose STRICT_EXPAND_OPEN_HIDDEN_FORBID_CLOSED index option

[lukas-vlcek]

Description

IndicesOptions class provide static methods to access all index options but this one. It seems like it has been forgotten. This PR addresses this which makes it possible to document this option the same way other index options are documented.

Important question: Does this PR changes public API in any way that needs to be documented or annotated?

I also changed one test to use access method instead of directly access the constant instance. See #20981 for more general discussion about this.

Related Issues

Closes: #20963

Check List

• Functionality includes testing.
• API changes companion pull request created, if applicable.
• Public documentation issue/PR created, if applicable.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
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[github-actions]

PR Reviewer Guide 🔍

(Review updated until commit 52e8bad)

Here are some key observations to aid the review process:

🧪 No relevant tests

🔒 No security concerns identified

📝 TODO sections test/framework/src/main/java/org/opensearch/test/OpenSearchIntegTestCase.java [1397]: RANDOMIZE with flush?

🔀 No multiple PR themes

⚡ No major issues detected

[lukas-vlcek]

To admins: I am not sure about the bug label for this PR. Should it be labeled as an enhancement instead (if there is such a label)?

[github-actions]

Persistent review updated to latest commit 0cad5ac

[github-actions]

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
General	Fix missing blank line in changelog The new changelog entry is missing a blank line before the ### Changed section header. According to the existing format in the file, there should be an empty line separating entries from section headers to maintain consistent formatting. CHANGELOG.md [29-30] - Add a new static method to IndicesOptions API to expose `STRICT_EXPAND_OPEN_HIDDEN_FORBID_CLOSED` index option ([#20980](https://github.com/opensearch-project/OpenSearch/pull/20980)) + ### Changed Suggestion importance[1-10]: 4 __ Why: The suggestion correctly identifies that a blank line is missing between the new changelog entry and the ### Changed section header, which would improve formatting consistency. However, this is a minor formatting issue with low impact on functionality.	Low

[github-actions]

Persistent review updated to latest commit 52e8bad

[lukas-vlcek]

‎CHANGELOG.md is a bit messed up at this point. I am adding an extra empty line after my new entry but notice that there is already one extra empty line in the list of enhancements. I do not want to put my record into that extra empty line because I think that waould make merging more conflicting for others.

[github-actions]

✅ Gradle check result for 52e8bad: SUCCESS

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.26%. Comparing base (6082a2a) to head (52e8bad).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #20980      +/-   ##
============================================
- Coverage     73.28%   73.26%   -0.03%     
- Complexity    72490    72509      +19     
============================================
  Files          5819     5819              
  Lines        331398   331399       +1     
  Branches      47887    47887              
============================================
- Hits         242875   242794      -81     
- Misses        68984    69073      +89     
+ Partials      19539    19532       -7     

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[cwperks]

To admins: I am not sure about the bug label for this PR. Should it be labeled as an enhancement instead (if there is such a label)?

IMO Changed would be the most appropriate category for this.