qa/suites/rados: remove rook coverage from the rados suite

qa/suites/rados: remove rook coverage from the rados suite

The rook team relies on a daily CI system to validate
rook changes. It doesn't seem that the teuthology tests
are maintained, so it makes sense to remove them from the
rados suite.

By removing this symlink, rook test coverage will remain
in the orch suite, and coverage will only be removed from the
rados suite.

Workaround for: https://tracker.ceph.com/issues/58585
Signed-off-by: Laura Flores <lflores@redhat.com>
(cherry picked from commit c26674ef4c6cbbdd94c54cafbd66e98704f044d7)