Represent shared/invited vfolders as rows of the `vfolders` table

It is complicated to query all accessible vFolders, and that's why `get_accessible_vfolders()` is hard to read and understand. The API joins `vfolders` and `vfolder_permissions` and takes additional steps to return list of dictionary.

Let's Insert shared/invited vFolders to vfolders table instead of `vfolder_permissions` table and migrate information of `vfolder_permissions` into `vfolders` for easy query.

related to #1900This will enable to replace `get_accessible_vfolders()` to RBAC API that returns `VFolderRow`

### Consideration

The migrated vfolders will have a different `id` from original vfolders. The migrated vfolders should have reference to original vfolder's id.

JIRA Issue: BA-137