Deprecate 'live' event in favor of 'setup' and 'teardown' in MW

See also Ieddbf5c684eb0edc3130034de64eb284aeaebbda

Bug: 55505
Change-Id: Ib48ef4f62ac53d41abb69f275f51da3d8b85ce0e
Merge "Deprecate 'live' event in favor of 'setup' and 'teardown' in MW"