Upgrade @testing-library/user-event to v14 (#40269)

* upgrades @testing-library/user-event to v14, updates test to accomidate events always returning promises and other breaking API changes

* Fixing up broken suites. Half way

* rest of tests

* green plz

* Fix new entries of userEvent usage

* unit test adjustments

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Co-authored-by: Nick Fitzpatrick <nickfitz.582@gmail.com>
Co-authored-by: Uladzimir Havenchyk <uladzimir.dev@gmail.com>