Fix Flakey Ajax test which has race condition

[MSNev]

No description provided.

[Copilot]

Pull request overview

This PR fixes a flaky Ajax test that had race conditions by migrating from external httpbin.org endpoints to local test server (localhost:9001) and implementing proper promise-based wait patterns for asynchronous XHR operations.

Key Changes

• Replaced all httpbin.org test URLs with localhost:9001/shared/ to eliminate external dependencies
• Added promise-based completion handlers for XHR requests to properly wait for request lifecycle completion before assertions
• Fixed typos in assertion messages (e.g., "Check first traceId" → "Check second traceId")
• Added proper cleanup with appInsightsCore.unload(false) in test teardown via onDone() callbacks

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated 2 comments.

File	Description
ajax.tests.ts	Replaced external test endpoints with localhost, added promise-based XHR completion handling to fix race conditions, corrected test assertion messages, added cleanup handlers, and fixed ExcludeRequestRegex pattern to match new localhost URLs
npm-shrinkwrap.json	Updated various npm package dependencies (automated lockfile updates)

Files not reviewed (1)

• common/config/rush/npm-shrinkwrap.json: Language not supported