[JS] Enable ui-tests on pipeline

[licanhua]

In PR #6833, MicrosoftEdge is not launched correctly, so ui-tests is disabled.

https://microsoft.visualstudio.com/AdaptiveCards/_build/results?buildId=43694518&view=logs&j=12f1170f-54f2-53f3-20dd-22fc7dff55f9&t=dee4e6ec-be1b-5671-4678-ab293b4004c5

Mock function › Test ActivityUpdate submit

WebDriverError: unknown error: net::ERR_CONNECTION_REFUSED
  (Session info: MicrosoftEdge=97.0.1072.55)

  at Object.throwDecodedError (node_modules/selenium-webdriver/lib/error.js:539:15)
  at parseHttpResponse (node_modules/selenium-webdriver/lib/http.js:647:13)
  at Executor.execute (node_modules/selenium-webdriver/lib/http.js:573:28)
  at thenableWebDriverProxy.execute (node_modules/selenium-webdriver/lib/webdriver.js:735:17)