Deprecate controller resolver auto mapping option

From #1924: Version 3.1 should mark the `doctrine.orm.controller_resolver.auto_mapping` option as deprecated.

Upgrade notes content:

```
### `doctrine.orm.controller_resolver.auto_mapping` option deprecated

The `doctrine.orm.controller_resolver.auto_mapping` only accepted `false` as value since 3.0 and supplying the value explicitly is now marked as deprecated.
``` 