Fix "Opcache breaks autoloading after E_COMPILE_ERROR"

[arnaud-lb]

Fixes GH-8063 (may also fix GH-8164, GH-8358)

Recorded errors may be attached to the wrong cached script when a fatal error occurs during recording. This happens because the fatal error will cause a bailout, which may prevent the recorded errors from being cleared. If a script is compiled after bailout (or a class is linked or bound), the recorded errors will be attached to it and cached.

More specifically, zend_do_link_class may enable error recording, but will not clear recorded errors if a bailout happens. This can also happen in zend_try_early_bind. preload_link and opcache_compile_file prevent this by using zend_try.

In this change I also use zend_try in zend_do_link_class and zend_try_early_bind to ensure that recorded errors are cleared before bailout.

I was not sure about the overhead of zend_try, so I ran some benchmarks:

With opcache: https://gist.github.com/arnaud-lb/fa42613d7c18061e0eaf64c3593d1e84

Without opcache: https://gist.github.com/arnaud-lb/c10841d190113e25bdacfdf44b0bd513

patch1 is this PR, patch0 is a different implementation that clears recorded errors in php_call_shutdown_functions instead of using zend_try.

link_class and bind_class are micro benchmarks for zend_do_link_class and zend_try_early_bind (here and here, respectively). I couldn't obtain stable results for these. The results are more dependent on the order of the PHP versions. than anything else.

The Symfony demo app benchmark shows no significant difference.