RDKBDEV-3226: Add AWS Keyspaces IAM Authentication, KMS Encryption, and Configurable JWT Validation

[ChaitanyaSingla]

This pull request introduces the following enhancements:

1. AWS Keyspaces Role-Based Access

   • Implements support for AWS Keyspaces authentication using IAM temporary credentials.
   • Enhances security by eliminating the need for static credentials.

2. Database Encryption with AWS KMS

   • Adds support for encrypting data stored in the database using AWS Key Management Service (KMS).

3. Configurable JWT Token Validation

   • Implements JWT validation by fetching the public key dynamically from a configurable endpoint.
   • Enhances security and flexibility in token verification.

[CLAassistant]

All committers have signed the CLA.

[rdkcmf-jenkins]

b'## Blackduck scan failure details

Summary: 0 violations, 0 files pending approval, 1 file pending identification.

• Protex Server Path: /home/blackduck/github/webconfig/282/rdkcentral/webconfig

• Commit: 0d60c03

Report detail: gist'

[mhughesacn]

Hi @ChaitanyaSingla: Please will you add headers to the two new .go files. The BD complaint is not significant and I will clear off on the next commit.
Thank you,
Martin - RDK CMF Compliance Team

[pradeeptakdas]

RDK Central JIRA: https://jira.rdkcentral.com/jira/browse/RDKBDEV-3226

[pradeeptakdas]

Internal JIRA for tracking: https://ccp.sys.comcast.net/browse/RDKCOM-5375