Fix code so it works with Node 18+

[Marwan Itani (marwan-itani)]

No description provided.

[Copilot]

Pull Request Overview

This PR migrates the AWS SDK from v2 to v3 to ensure compatibility with Node.js 18+. The v2 SDK is deprecated and incompatible with newer Node.js versions.

• Replaces aws-sdk with modular @aws-sdk/client-* packages
• Updates configuration loading from callback-based to Promise/async-await pattern
• Modernizes test mocking from aws-sdk-mock to aws-sdk-client-mock

Reviewed Changes

Copilot reviewed 5 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
package.json	Adds AWS SDK v3 client packages and new test mocking library
build/package.json	Adds AWS SDK v3 client packages for build dependencies
config/generic.config.js	Migrates from AWS SDK v2 to v3 with async/await pattern
mocha/generic-config.js	Updates tests to use new mocking library and async patterns
authn/pkce.index.js	Updates to use Promise-based configuration loading

Files not reviewed (1)

• build/package-lock.json: Language not supported

Comments suppressed due to low confidence (2)

[Copilot]

This console.error log may expose sensitive AWS error details in production. Consider logging only a generic error message or use a proper logging framework with configurable levels.

Suggested change

	console.error("Error fetching configuration:", err);
	if (process.env.NODE_ENV !== 'production') {
	console.error("Error fetching configuration:", err);
	} else {
	console.error("Error fetching configuration.");
	}