Set pool flag to fix pool_addfileprovides_queue() without filelists.xml

Since dnf4 now also conditionally load filelists it ran into the same
problem as dnf5 here: rpm-software-management/dnf5#520

Additional details in: openSUSE/libsolv#531

libdnf/dnf-sack.cpp

@@ -185,6 +185,7 @@ dnf_sack_init(DnfSack *sack)
     DnfSackPrivate *priv = GET_PRIVATE(sack);
     priv->pool = pool_create();
     pool_set_flag(priv->pool, POOL_FLAG_WHATPROVIDESWITHDISABLED, 1);
+    pool_set_flag(priv->pool, POOL_FLAG_ADDFILEPROVIDESFILTERED, 1);
     priv->running_kernel_id = -1;
     priv->running_kernel_fn = running_kernel;
     priv->considered_uptodate = TRUE;