Update managed-io.md for release 2.70.0-RC2

[Abacn]

Content generated from release 2.70.0-RC2.

[gemini-code-assist]

Summary of Changes

Hello @Abacn, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the managed-io.md documentation to reflect changes for release 2.70.0-RC2. The primary focus is on enhancing the clarity and accuracy of JDBC connector configurations, including the addition of a new streaming pipeline parameter and a significant restructuring of PostgreSQL, MySQL, and SQL Server I/O documentation to correctly separate and detail read and write specific configurations.

Highlights

• New Configuration Parameter: Introduced direct_write_byte_limit (an int32 type) to control the limit for lifting bundles into the direct write path for streaming pipelines.
• JDBC Documentation Refinement: Reordered and corrected the documentation sections for MYSQL and SQLSERVER (both Read and Write operations) to ensure logical flow and accuracy in the managed-io.md file.
• PostgreSQL I/O Parameter Separation: The POSTGRES Read and Write documentation sections were reordered, and their specific parameters were updated and clearly delineated for read and write operations, improving clarity and correctness. This included adding autosharding, batch_size, jdbc_type, and write_statement to the POSTGRES Write section, and ensuring location and other parameters correctly reflect their read/write context.

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[github-actions]

Assigning reviewers:

R: @shunping for label website.

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[shunping]

LGTM