Backport PR #15640 to 8.11: Added missing method of logger wrapper for puma

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Backport PR #15640 to 8.11 branch, original message:

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Release notes

Fix node stats API when the API path is invalid

What does this PR do?

The PR adds the missing method debug? in DelegatingLogWriter

Puma uses stderr to log error. DelegatingLogWriter takes IOWrappedLogger as stderr and IOWrappedLogger takes DelegatingLogWriter as logger. IOWrappedLogger checks logger level here.

Why is it important/What is the impact to the user?

The change allow node state to return meaningful error message

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files (and/or docker env variables)
• I have added tests that prove my fix is effective or that my feature works

Author's Checklist

• [ ]

How to test this PR locally

Run this branch and curl -XGET 'localhost:9600/_node/stats/invalid_path'. The response should not throw exception.

Related issues

• Fixes: node stats API raise error when the path is invalid  #15639
• Relates: Update puma to version 6.3 #15158

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