Add `zend_get_attribute_object()` (#14161)

* Add `zend_get_attribute_object()`

This makes the implementation for `ReflectionAttribute::newInstance()`
reusable.

* Add te

Add `zend_get_attribute_object()` (#14161)

* Add `zend_get_attribute_object()`

This makes the implementation for `ReflectionAttribute::newInstance()`
reusable.

* Add test for the stack trace behavior of ReflectionAttribute::newInstance()

This test ensures that the `filename` parameter for the fake stack frame is
functional. Without it, the stack trace would show `[internal function]` for
frame `#0`.

* Fix return type of `call_attribute_constructor`

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