Enable physics interpolation in all 2D demos (#1070)

This makes uses of the new built-in 2D physics interpolation
added in 4.3.

For 3D demos, a separate PR requiring `master` will be made later.

Author: Calinou

2d/dynamic_tilemap_layers/project.godot

@@ -63,6 +63,7 @@ move_right={
 
 common/physics_ticks_per_second=120
 2d/default_gravity=500
+common/physics_interpolation=true
 
 [rendering]
 

2d/dynamic_tilemap_layers/world.tscn

@@ -34,6 +34,7 @@ script = ExtResource("2_q8fhk")
 
 [node name="Camera2D" type="Camera2D" parent="."]
 offset = Vector2(265, 247)
+process_callback = 0
 
 [node name="Player" parent="." instance=ExtResource("3")]
 position = Vector2(120, 456)

2d/finite_state_machine/Demo.tscn

@@ -45,6 +45,7 @@ libraries = {
 }
 
 [node name="StateNameDisplayer" parent="Player" index="5"]
+physics_interpolation_mode = 1
 theme_override_fonts/font = ExtResource("2_r1c5f")
 
 [node name="Explanations" type="RichTextLabel" parent="."]

2d/finite_state_machine/player/bullet/bullet_spawner.gd

@@ -13,6 +13,6 @@ func fire() -> void:
 
 	$CooldownTimer.start()
 	var new_bullet := bullet.instantiate()
-	add_child(new_bullet)
 	new_bullet.position = global_position
 	new_bullet.direction = owner.look_direction
+	add_child(new_bullet)

2d/finite_state_machine/project.godot

@@ -98,6 +98,7 @@ attack={
 [physics]
 
 common/physics_ticks_per_second=120
+common/physics_interpolation=true
 
 [rendering]
 

2d/hexagonal_map/project.godot

@@ -64,6 +64,7 @@ move_up={
 [physics]
 
 common/physics_ticks_per_second=120
+common/physics_interpolation=true
 
 [rendering]
 

2d/hexagonal_map/troll.tscn

@@ -25,3 +25,4 @@ position = Vector2(3.24216, 19.453)
 shape = SubResource("1")
 
 [node name="Camera2D" type="Camera2D" parent="."]
+process_callback = 0

2d/instancing/project.godot

@@ -31,6 +31,7 @@ window/stretch/aspect="expand"
 
 common/physics_ticks_per_second=120
 2d/default_gravity=300
+common/physics_interpolation=true
 
 [rendering]
 

2d/instancing/scene_instancing.tscn

@@ -101,3 +101,4 @@ physics_material_override = SubResource("10")
 
 [node name="Camera2D" type="Camera2D" parent="."]
 offset = Vector2(576, 324)
+process_callback = 0

2d/isometric/player/goblin.tscn

@@ -1916,6 +1916,7 @@ rotation = 1.5708
 shape = SubResource("1")
 
 [node name="Camera2D" type="Camera2D" parent="."]
+process_callback = 0
 
 [node name="LightOccluder2D" type="LightOccluder2D" parent="."]
 visible = false