[DependencyInjection] add ability to dump objects

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | 
| License       | MIT
| Doc PR        | 

It allows us to use objects in parameters, also pass var_export-able object parameters to services.

It could be useful in many ways, i would like to use it to store annotation objects in parameters (anyway i would have to instantiate reflectionclass)