Replace infill_hollow by infill_support_enabled

It's not the exact same functionality, but very similar and equally expert.

Contributes to issue CURA-5108.

resources/setting_visibility/expert.cfg

@@ -87,6 +87,7 @@ gradual_infill_steps
 gradual_infill_step_height
 infill_before_walls
 min_infill_area
+infill_support_enabled
 skin_preshrink
 top_skin_preshrink
 bottom_skin_preshrink
@@ -369,7 +370,6 @@ spaghetti_infill_extra_volume
 support_conical_enabled
 support_conical_angle
 support_conical_min_width
-infill_hollow
 magic_fuzzy_skin_enabled
 magic_fuzzy_skin_thickness
 magic_fuzzy_skin_point_density