gsk: Stop padding text node bounds

This should not be necessary, provided that the ink extents that
pango provides are accurate.

Update affected tests.

gsk/gskrendernodeimpl.c

@@ -5855,10 +5855,10 @@ gsk_text_node_new (PangoFont              *font,
   self->num_glyphs = n;
 
   gsk_rect_init (&node->bounds,
-                 offset->x + ink_rect.x - 1,
-                 offset->y + ink_rect.y - 1,
-                 ink_rect.width + 2,
-                 ink_rect.height + 2);
+                 offset->x + ink_rect.x,
+                 offset->y + ink_rect.y,
+                 ink_rect.width,
+                 ink_rect.height);
 
   return node;
 }