Update to M.E.AI 9.4.0-preview.1.25207.5

[jozkee]

Description

Updates AWSSDK.Extensions.Bedrock.MEAI to use the latest (close to stable) version of Microsoft.Extensions.AI.Abstractions.

Motivation and Context

Stay up to date.

Testing

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project
• My change requires a change to the documentation
• I have updated the documentation accordingly
• I have read the README document
• I have added tests to cover my changes
• All new and existing tests passed

License

• I confirm that this pull request can be released under the Apache 2 license

[dscpinheiro]

@jozkee Could you rebase on top of the latest v4-development branch? We just released a preview today which also modified the files you're changing here.

[jozkee]

@dscpinheiro done.