Fixed removal of new presence stream states (#10014)

Fixes: https://github.com/matrix-org/synapse/issues/9962



This is a fix for above problem.

I fixed it by swaping the order of insertion of new records and deletion of old ones. This ensures that we don't delete fresh database records as we do deletes before inserts.

Signed-off-by: Marek Matys <themarcq@gmail.com>