refactor: move allowed doctypes to accounts settings

- dropped 'allowed' field

(cherry picked from commit d5c58277cb)

erpnext/patches/v16_0/merge_repost_settings_to_accounts_settings.py

@@ -0,0 +1,10 @@
+import frappe
+
+
+def execute():
+	if allowed := frappe.get_hooks("repost_allowed_doctypes"):
+		accounts_settings = frappe.get_doc("Accounts Settings")
+		for x in allowed:
+			if x not in [t.document_type for t in accounts_settings.repost_allowed_types]:
+				accounts_settings.append("repost_allowed_types", {"document_type": x})
+		accounts_settings.save()