fix(manufacturing): reach the whole configurator from tree toolbar actions

The toolbar handlers were copied onto view.events as unbound functions, so
`this` inside them was that object literal rather than the BOMConfigurator.
They worked only because the literal also carried `frm`, and broke as soon as
a handler called a method the literal did not list: get_item_code, added when
the tree started keying nodes on the row name, threw
"this.get_item_code is not a function" and killed Add Raw Material, Add Sub
Assembly and Convert to Sub Assembly.

Assign the instance instead of a hand-maintained whitelist. Every method is
reachable, `this.frm` keeps working, and no future method can be forgotten.

Fixes #57773

(cherry picked from commit 097ce0f348)

erpnext/public/js/bom_configurator/bom_configurator.bundle.js

@@ -32,18 +32,7 @@ class BOMConfigurator {
 	}
 
 	bind_events() {
-		frappe.views.trees["BOM Configurator"].events = {
-			frm: this.frm,
-			add_item: this.add_item,
-			add_sub_assembly: this.add_sub_assembly,
-			set_query_for_workstation: this.set_query_for_workstation,
-			get_sub_assembly_modal_fields: this.get_sub_assembly_modal_fields,
-			convert_to_sub_assembly: this.convert_to_sub_assembly,
-			delete_node: this.delete_node,
-			edit_bom: this.edit_bom,
-			load_tree: this.load_tree,
-			set_default_qty: this.set_default_qty,
-		};
+		frappe.views.trees["BOM Configurator"].events = this;
 	}
 
 	tree_options() {