Add RHE Linux 8 stream and AWS linux to software requirement doc

[TomShawn]

What is changed, added or deleted? (Required)

Add RHE Linux 8 stream and AWS linux to software requirement doc

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• [ ] master (the latest development version)
• [ ] v6.4 (TiDB 6.4 versions)
• [ ] v6.3 (TiDB 6.3 versions)
• [x] v6.1 (TiDB 6.1 versions)
• [ ] v5.4 (TiDB 5.4 versions)
• [ ] v5.3 (TiDB 5.3 versions)
• [ ] v5.2 (TiDB 5.2 versions)
• [ ] v5.1 (TiDB 5.1 versions)
• [ ] v5.0 (TiDB 5.0 versions)

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• [ ] Delete files
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[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• dveeden

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[easonn7]

LGTM

[JasonWu0506]

LGTM

[TomShawn]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: c844ed8b8a8b3e79d01b45b4838279a7e46fc63d