### Godot version

v4.0.3.stable.mono.official [5222a99f5]

### System information

macOS Monterey 12.6.6 (21G646)

### Issue description

When creating a tileset by code with custom data layers, removing a layer with `remove_custom_data_layer` does not update the name-to-layer mapping; `get_custom_data_layer_by_name` will continue to return that layer's original index.

This has a downstream effect of causing TileData objects attempting to use `get_custom_data('Layer B')` to return invalid data (whatever custom data is now in Layer B's old index; e.g. Layer C).

I would expect that after using `remove_custom_data_layer`, I would be able to still use `get_custom_data_layer_by_name` on that tileset.

### Steps to reproduce

Run this code to see that getting Layer B by name after removing the first layer continues to return its original index (1) when in reality it is now at index 0.
```
	var tileset:TileSet = TileSet.new()

	tileset.add_custom_data_layer()
	tileset.set_custom_data_layer_name(0, 'Layer A')
	tileset.set_custom_data_layer_type(0, TYPE_INT)

	tileset.add_custom_data_layer()
	tileset.set_custom_data_layer_name(1, 'Layer B')
	tileset.set_custom_data_layer_type(1, TYPE_STRING)

	print('Layer index 0 name : ', tileset.get_custom_data_layer_name(0)) # Layer A
	print('Layer index 1 name : ', tileset.get_custom_data_layer_name(1)) # Layer B
	print('Layer B is on index : ', tileset.get_custom_data_layer_by_name("Layer B")) # 1

	print('----- removing custom data layer 0 -----')
	tileset.remove_custom_data_layer(0)

	print('Layer index 0 name : ', tileset.get_custom_data_layer_name(0)) # Layer B
	print('Layer index 1 name : ', tileset.get_custom_data_layer_name(1)) # prints an error, as expected
	print('Layer B is on index : ', tileset.get_custom_data_layer_by_name("Layer B")) # returns 1 still! should return 0.
```

### Minimal reproduction project

[RemoveCustomDataLayer.zip](https://github.com/godotengine/godot/files/11804762/RemoveCustomDataLayer.zip)

ADD_PROPERTY(PropertyInfo(Variant::VECTOR2I, "tile_size", PROPERTY_HINT_NONE, "suffix:px"), "set_tile_size", "get_tile_size");
	
	ClassDB::bind_method(D_METHOD("set_uv_clipping", "uv_clipping"), &TileSet::set_uv_clipping);
	ClassDB::bind_method(D_METHOD("is_uv_clipping"), &TileSet::is_uv_clipping);
	ClassDB::bind_method(D_METHOD("get_occlusion_layers_count"), &TileSet::get_occlusion_layers_count);
	ClassDB::bind_method(D_METHOD("add_occlusion_layer", "to_position"), &TileSet::add_occlusion_layer, DEFVAL(-1));
	ClassDB::bind_method(D_METHOD("move_occlusion_layer", "layer_index", "to_position"), &TileSet::move_occlusion_layer);
	ClassDB::bind_method(D_METHOD("remove_occlusion_layer", "layer_index"), &TileSet::remove_occlusion_layer);
	ClassDB::bind_method(D_METHOD("set_occlusion_layer_light_mask", "layer_index", "light_mask"), &TileSet::set_occlusion_layer_light_mask);
	ClassDB::bind_method(D_METHOD("get_occlusion_layer_light_mask", "layer_index"), &TileSet::get_occlusion_layer_light_mask);
	ClassDB::bind_method(D_METHOD("set_occlusion_layer_sdf_collision", "layer_index", "sdf_collision"), &TileSet::set_occlusion_layer_sdf_collision);
	ClassDB::bind_method(D_METHOD("get_occlusion_layer_sdf_collision", "layer_index"), &TileSet::get_occlusion_layer_sdf_collision);
	
	ClassDB::bind_method(D_METHOD("get_physics_layers_count"), &TileSet::get_physics_layers_count);
	ClassDB::bind_method(D_METHOD("add_physics_layer", "to_position"), &TileSet::add_physics_layer, DEFVAL(-1));
	ClassDB::bind_method(D_METHOD("move_physics_layer", "layer_index", "to_position"), &TileSet::move_physics_layer);
	ClassDB::bind_method(D_METHOD("remove_physics_layer", "layer_index"), &TileSet::remove_physics_layer);
	ClassDB::bind_method(D_METHOD("set_physics_layer_collision_layer", "layer_index", "layer"), &TileSet::set_physics_layer_collision_layer);
	ClassDB::bind_method(D_METHOD("get_physics_layer_collision_layer", "layer_index"), &TileSet::get_physics_layer_collision_layer);
	ClassDB::bind_method(D_METHOD("set_physics_layer_collision_mask", "layer_index", "mask"), &TileSet::set_physics_layer_collision_mask);
	ClassDB::bind_method(D_METHOD("get_physics_layer_collision_mask", "layer_index"), &TileSet::get_physics_layer_collision_mask);
	ClassDB::bind_method(D_METHOD("set_physics_layer_physics_material", "layer_index", "physics_material"), &TileSet::set_physics_layer_physics_material);
	ClassDB::bind_method(D_METHOD("get_physics_layer_physics_material", "layer_index"), &TileSet::get_physics_layer_physics_material);
	
	ClassDB::bind_method(D_METHOD("get_terrain_sets_count"), &TileSet::get_terrain_sets_count);
	ClassDB::bind_method(D_METHOD("add_terrain_set", "to_position"), &TileSet::add_terrain_set, DEFVAL(-1));
	ClassDB::bind_method(D_METHOD("move_terrain_set", "terrain_set", "to_position"), &TileSet::move_terrain_set);
	ClassDB::bind_method(D_METHOD("remove_terrain_set", "terrain_set"), &TileSet::remove_terrain_set);
	ClassDB::bind_method(D_METHOD("set_terrain_set_mode", "terrain_set", "mode"), &TileSet::set_terrain_set_mode);
	ClassDB::bind_method(D_METHOD("get_terrain_set_mode", "terrain_set"), &TileSet::get_terrain_set_mode);