Update related documentation to Clickpipes using AWS IAM

[masterashu]

Summary

Checklist

• Delete items not relevant to your PR
• URL changes should add a redirect to the old URL via https://github.com/ClickHouse/clickhouse-docs/blob/main/vercel.json
• If adding a new integration page, also add an entry to the integrations list here: https://github.com/ClickHouse/clickhouse-docs/blob/main/docs/integrations/index.mdx

[vercel]

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Project	Deployment	Actions	Updated (UTC)
clickhouse-docs	Ready	Preview, Comment	Jul 16, 2026 2:56pm
clickhouse-docs-jp	Building	Preview, Comment	Jul 16, 2026 2:56pm
clickhouse-docs-ko	Error		Jul 16, 2026 2:56pm
clickhouse-docs-ru	Error		Jul 16, 2026 2:56pm
clickhouse-docs-zh	Error		Jul 16, 2026 2:56pm

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1 out of 2 committers have signed the CLA.

✅ dhtclk
❌ masterashu
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[pfcoperez]

LGTM though I think adding an example of what's expected to be set-up where would mark the difference.

[dhtclk]

@masterashu - This is still in draft, is it good to go?

UPDATE: In draft status as feature has not released yet.

[mintlify]

Docs PR opened: ClickHouse/ClickHouse#110711

Added optional AWS IAM authentication instructions to ClickPipes MySQL and Postgres RDS/Aurora source pages and restructured the auth guide.