Port most html tests to html2 (#5649)

* Port tests

* Port send box related tests

* Port tests

* Port tests

* Port fluentTheme

* Port focusManagement

* Port rich card and localization

* Port Markdown and meta tag

* Port middleware*

* Port offlineUI

* Port ponyfill

* Port performance

* Port replyToId

* Port scrollToEndButton

* Port sendFiles

* Port simple

* Port styleOptions

* Port some suggestedActions

* Port timestamp

* Port transcript tests

* Port typingIndicator.liveRegion

* Port updateActivity

* Port upload/image, hooks/useFocus, and hooks/useTextBoxSubmit

* Port decorator and video

* Port hooks

* Move performance

Author: compulim