[FEATURE] Migrate AWS SDK for JavaScript v2 APIs to v3

[trivikr]

Required Basic Info
To properly assess the enhancement request, we require information on the version of the Accelerator you based this request upon:

• Accelerator Version: All

Is your feature request related to a problem? Please describe.

AWS SDK for JavaScript v2 will enter maintenance mode on September 8, 2024 and reach end-of-support on September 8, 2025. For more information, check blog post at https://a.co/cUPnyil

The aws-secure-environment-accelerator makes calls using AWS SDK for JavaScript v2 at many places
https://github.com/search?q=repo%3Aaws-samples%2Faws-secure-environment-accelerator+aws-sdk&type=code

Describe the solution you'd like

Migrate AWS SDK for JavaScript v2 APIs to v3.

Describe alternatives you've considered
N/A

[trivikr]

Attempt from Nov'23 #1196