net/mlx5: fs_chains: Refactor to detach chains from tc usage

To support more generic chains that will be used on other
namespaces and without tc, refactor to remove the dependency
on tc terms.

Signed-off-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Raed Salem <raeds@nvidia.com>
Link: https://lore.kernel.org/r/bb8570d532d569285b5bff981578507bd15350cb.1678714336.git.leon@kernel.org


Signed-off-by: Leon Romanovsky <leon@kernel.org>