Remove support of AWS SDK v1 from the plugin

[ParthaI]

We should remove any support for AWS SDK V1 from the plugin code, as This SDK is in maintenance mode. It will enter end-of-life on July 31, 2025.

Announcement reference: AWS SDK V1 End-of-Life

Key Areas to Address:

• Region Matrix Building: Ensure that the region matrix is correctly built using AWS SDK V2.
• Supported Regions for the Service: Verify that all services and their supported regions are accurately handled when migrating to SDK V2.

Helpful Links:

• How to Get a List of AWS Regions Programmatically in Go SDK V2
• AWS SDK V2 Endpoint JSON File

Additional Considerations:

• Code Refactoring: All API calls and configuration that currently rely on SDK V1 should be reviewed and updated to align with SDK V2, especially considering any changes in API methods, request construction, or error handling.
• Dependency Management: Ensure that the Go modules file (go.mod) is updated to remove dependencies on SDK V1 and only include SDK V2.
• Testing and Compatibility: After the migration, thoroughly test the plugin to ensure it works seamlessly with all the AWS services it interacts with, especially focusing on services and regions specific to your use cases.

[github-actions]

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