net/mlx5: fix meter suffix table leak

net/mlx5: fix meter suffix table leak

Currently, the meter suffix table is created and saved in the mlx5
shared struct. It causes the suffix table will never be released
even without any meter rules.

Move the suffix table to meter domain struct to help the suffix table
be released when all the meter rules are destroyed.

Fixes: 46a5e6bc6a85 ("net/mlx5: prepare meter flow tables")
Cc: stable@dpdk.org
Signed-off-by: Suanming Mou <suanmingm@mellanox.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>