[5.8] Fix command output/questions expectations

[themsaid]

As reported in #29521, when trying to test that a question was asked multiple times or output was printed multiple times, the out of order exception is thrown.

This PR brings back the use of once(). However, it handles the Mockery exception thrown so instead of people seeing:

Mockery\Exception\InvalidCountException: Method doWrite('hola mundo', <Any>) from Mockery_0_Symfony_Component_Console_Output_BufferedOutput should be called
 exactly 1 times but called 0 times.

People see:

Output "hola mundo" was not printed.