[HttpKernel] make ExceptionEvent able to propagate any throwable #34309
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An alternative to #34306.
As a reminder, the goal of this series of PRs is to remove the
FatalThrowableError
wrapper that we introduced to seamlessly handle throwables when they were introduced in PHP 7.From the changelog of
HttpKernel
:ExceptionEvent::get/setException()
, useget/setThrowable()
insteadExceptionListener
, useErrorListener
insteadAnd the final target: removed
Symfony\Component\ErrorHandler\Exception\ErrorException
(FatalThrowableError
is already deprecated.)