[AWS Cloudwatch Input] Make secret false

[muthu-mps]

• Enhancement

Proposed commit message

This PR sets secret: false until secret: true has been verified to work with OTel input packages.

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.
• I have verified that any added dashboard complies with Kibana's Dashboard good practices

Author's Checklist

• [ ]

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[github-actions]

Elastic Docs Style Checker (Vale)

Summary: 1 suggestion found

💡 Suggestions (1): Optional style improvements. Apply when helpful.

File	Line	Rule	Message
packages/aws_cloudwatch_input_otel/changelog.yml	4	Elastic.WordChoice	Consider using 'deactivate, deselect, hide, turn off' instead of 'Disable', unless the term is in the UI.

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[elastic-vault-github-plugin-prod]

✅ All changelog entries have the correct PR link.

[elasticmachine]

💚 Build Succeeded

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cc @muthu-mps