docs: document ADC regions

[ShelbyZ]

Summary

Expand changes in prior docs #2507 to add Amazon Dedicated Cloud regions to-be-added in fluent/fluent-bit#11733

Summary by CodeRabbit

• Documentation
  • Expanded supported AWS regions for CloudWatch, Kinesis Firehose, Kinesis Streams, and S3 output plugins. Configuration now supports China regions (cn-), AWS European Sovereign Cloud regions (eusc-), and Amazon Dedicated Cloud regions (us-iso-, us-isob-, us-isof-, eu-isoe-).

[coderabbitai]

📝 Walkthrough

Walkthrough

Documentation updates expand supported AWS region patterns across four output plugins (CloudWatch, Kinesis Firehose, Kinesis Streams, S3) to include China, AWS European Sovereign Cloud, and Amazon Dedicated Cloud regions with corresponding endpoint suffixes.

Changes

Cohort / File(s)	Summary
AWS Output Plugin Documentation Updates pipeline/outputs/cloudwatch.md, pipeline/outputs/firehose.md, pipeline/outputs/kinesis.md, pipeline/outputs/s3.md	Expanded region pattern documentation to include China (cn-*), AWS European Sovereign Cloud (eusc-*), and Amazon Dedicated Cloud (us-iso-*, us-isob-*, us-isof-*, eu-isoe-*) with corresponding endpoint suffixes (.c2s.ic.gov, .sc2s.sgov.gov, .csp.hci.ic.gov, .cloud.adc-e.uk).

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Possibly related PRs

• docs: outputs: aws plugins adding description of EUSC and China region endpoint handling #2507: Modifies the same AWS output plugin documentation files to update region and endpoint handling for China and EUSC regions.

Suggested labels

5.0

Suggested reviewers

• patrick-stephens
• cosmo0920

Poem

🐰 Across the regions, far and wide,
From cn-* to isles far-flung with pride,
Dedicated clouds and sovereign lands so grand,
Fluent Bit's reach extends through every land!
Documentation blooms, the world now knows,
Where every endpoint goes and flows. ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'docs: document ADC regions' accurately reflects the primary change—adding documentation for Amazon Dedicated Cloud regions across multiple AWS output plugins.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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