Trashcan REST API: optionally restore node to new location

Using the existing API [restoreDeletedNode](https://api-explorer.alfresco.com/api-explorer/#!/trashcan/restoreDeletedNode) it is possible that an attempt to restore a node will fail if the original parent location no longer exists.

A client developer should be able to optionally pass a target parent id as a new location (eg. if the user is prompted to choose a new location to which they have write access).

Acceptance Criteria

• update API spec so that the POST operation accepts an optional body with "targetParentId" field/or "assocType" fields. Also add description and any missing error codes etc.
• implement API option to call nodeServiceArchive with the specified targetParentId or otherwise null
• add JUnit test (+ve & -ve) including appropriate error codes such as 403, 404, 409, ... etc
• add TAS-level test

Implementation Notes

• note: nodeArchiveService already provides option to (attempt to) restore new location
• can optionally specify targetParentId (maps to destinationNodeRef arg) or null for original
• can optionally specify assocType (maps to assocTypeQName) or null for original

Open Questions

• investigate: is it possible to optionally override name on restore (TODO check if this can be done via assocName) ?

Example Request

POST /deleted-nodes/{archiveNodeId}/restore
{
  "targetParentId": "....",
  "assocType": "...."
}