[HttpFoundation] Session - added a native proxy session storage

| Q             | A
| ------------- | ---
| Bug fix?      | [no]
| New feature?  | [yes]
| BC breaks?    | [no]
| Deprecations? | [no]
| Tests pass?   | [yes]
| Fixed tickets | [#5248]
| License       | MIT
| Doc PR        | todo

This is an attempt to allow sessions to be started outside symfony.