Refactors extracted from #488 to clean up the diff:
Isolate 'standard' page (no timeout) in describe block so that both standard and deferred page tests have beforeEach and afterEach to open and close the page
Rename SupportedQueries to SynchronousQueries in preparation to support find* queries
Use queries from Testing Library to enumerate queries (instead of internal hard-coded query name array, with the intention of removing all of the legacy ElementHandle implementation in a future major release)
Refactors extracted from #488 to clean up the diff:
describeblock so that both standard and deferred page tests havebeforeEachandafterEachto open and close the pageSupportedQueriestoSynchronousQueriesin preparation to supportfind*queries