feat(roles): prepare migration ReBAC to roles

prepare migration of permission to roles
    this simplify drastically database (permission are now simply defined in code)
    and will permit reuse of the same ReBAC engine to define owners of drives

    mapping:

    ```
        Role::Viewer => &[Permission::Read],
        Role::Commenter => &[Permission::Read, Permission::Comment],
        Role::Contributor => &[Permission::Read, Permission::Create],
        Role::Editor => &[
            Permission::Read,
            Permission::Comment,
            Permission::Create,
            Permission::Update,
        ],
        Role::Owner => &[
            Permission::Read,
            Permission::Comment,
            Permission::Create,
            Permission::Update,
            Permission::Share,
            Permission::Delete,
            Permission::Manage,
        ],
    ```

tests/api/run.sh

@@ -146,6 +146,7 @@ hurl --variables-file "$API_DIR/test.env" --file-root "$REPO_ROOT/tests" --test
   "$API_DIR/public_shares.hurl" \
   "$API_DIR/permissions.hurl" \
   "$API_DIR/grants.hurl" \
+  "$API_DIR/role_grants.hurl" \
   "$API_DIR/subject_groups.hurl" \
   "$API_DIR/groups_effective_members.hurl" \
   "$API_DIR/grants_nested_groups.hurl" \