Clean up BroadcastChannel resources to fix hanging tests

[konstantin-msft]

• Clean up BroadcastChannel resources to fix hanging tests

[Copilot]

Pull Request Overview

This PR addresses resource leakage issues in the test suite by implementing proper cleanup mechanisms for BroadcastChannel instances, which were causing tests to hang and requiring the --forceExit flag.

Key changes:

• Implements tracking and cleanup for BroadcastChannel instances across test environments
• Removes the --forceExit flag from Jest configuration since proper cleanup eliminates the need for it
• Adds cleanup hooks in test setup files to ensure resources are cleaned up after each test

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
shared-configs/jest-config/setupGlobals.cjs	Adds BroadcastChannel tracking and cleanup utilities for browser test environment
lib/msal-browser/test/utils/BridgeSetup.ts	Adds cleanup hooks to ensure BroadcastChannels are cleaned up after tests
lib/msal-browser/test/app/PCANonBrowser.spec.ts	Implements BroadcastChannel tracking and cleanup for Node.js test environment
lib/msal-browser/package.json	Removes --forceExit flag from Jest test command

[Copilot]

Pull Request Overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated no new comments.