More concrete return type for opcache_get_configuration

[devnix]

Array shape based on https://github.com/php/php-src/blob/master/ext/opcache/zend_accelerator_module.c#L800-L904

[VincentLanglet]

Not sure such precision is needed ; wasn't https://github.com/phpstan/phpstan-src/pull/5422/changes enough ?
Dunno what you think about it @staabm ; this would make a huge constant array (which are often simplified)

[staabm]

what the real world use-case/motivation for this change?

[devnix]

Expecting a shape, avoiding unnecessary checks of array keys, reporting typos in array keys...

[staabm]

I think we can land the change after we added a separate NodeScopeResolverTest in nsrt/.

usually we don't enforce nsrt/ tests for changes in resources/functionMap.php but I think in this case it would be useful, because we add a very long line full of escaping etc. and its pretty easy to get something wrong in this case.

does the suggested return-type array-shape also work for PHP7?
is it something we need to make php version specific?