This adds a task that sets `autotune_memory_target_ratio` depending on the
value of `is_hci`.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=2028693

Signed-off-by: Guillaume Abrioux <[email protected]>
(cherry picked from commit 41d62596fcbe01c83c97bfa28ecbf7ee00b9d072)