Chore: Upgrade jest-environment-jsdom, auth0.js, component-cdn-uploader and validator (#2693)

### Changes

This PR completes the migration from the deprecated
jest-environment-jsdom-global package to the
standard jest-environment-jsdom, fixing all test failures and resolving
security vulnerabilities.

### Package Updates

  - Removed deprecated `jest-environment-jsdom-global` dependency
  - Using `jest-environment-jsdom@30.2.0` (already at target version)
  - Updated `validator` from `^13.6.0` to `^13.15.22` (security fix)
  - Keeping `auth0-js@9.29.0` (latest v9.x)
  - Keeping `@auth0/component-cdn-uploader@2.4.2`

### Test Infrastructure Changes

  - Created custom Jest environment to expose `jsdom` instance
- Enhanced `setURL()` utility with dual-approach `window.location`
mocking
  - Updated 2 snapshot files
  - Cleaned up unnecessary code in setup-tests.js

### Testing

- No functional changes in production code.
- All test suites continue to pass with the updated setup.
- Minor snapshot changes due to rendering differences in updated jsdom
and Jest versions.

### Checklist

* [ ] I have read the [Auth0 general contribution
guidelines](https://github.com/auth0/open-source-template/blob/master/GENERAL-CONTRIBUTING.md)
* [ ] I have read the [Auth0 Code of
Conduct](https://github.com/auth0/open-source-template/blob/master/CODE-OF-CONDUCT.md)
* [ ] All code quality tools/guidelines have been run/followed
* [ ] All relevant assets have been compiled

Author: ankita10119

customJsdomEnvironment.js

@@ -0,0 +1,9 @@
+const JSDOMEnvironment = require('jest-environment-jsdom').default;
+
+module.exports = class CustomJsdomEnvironment extends JSDOMEnvironment {
+  async setup() {
+    await super.setup();
+    // Expose jsdom instance globally so tests can call jsdom.reconfigure()
+    this.global.jsdom = this.dom;
+  }
+};