[PropertyAccess] add support for magic call

Hi,

I add support for magic call with the `PropertyAccess`

the is basic implementation, if no `getter`, `isser`, or `hasser` or `_get` is found and there is `__call` then the PropertyAccess call the getter

the same for setter.

This functionality is disable by default 

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | seems OK (failure/errors are the same on master)
| Fixed tickets | #4683, #6413, #5309
| License       | MIT
| Doc PR        | https://github.com/symfony/symfony-docs/pull/2472

- [x] submit changes to the documentation

@bschussek is this ok ?