Feature: #73752 - Allow accessing ObjectStorage as array in Fluid and other places 

See forge#73752

Description 

Creates an alias of toArray() allowing the method to be called as getArray() which in turn allows the method to be called transparently from ObjectAccess::getPropertyPath, enabling access in Fluid and other places.

Impact 

By creating an extremely simple aliasing of toArray() on ObjectStorage allowing it to be called as getArray() enables:

ObjectAccess::getPropertyPath($subject, 'objectstorageproperty.array.4') to get the 4th element
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{myObject.objectstorageproperty.array.4} in Fluid (including {myObject.objectstorageproperty.array.{dynamicIndex}} in v8)
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