acrn-config: refine the data type for member of class

Unify the data type for scenario item.

1. Unified the scenario item, the type modified from list to dictionary.
2. remove some unused function.
3. add 'pci_dev_num'/'pci_devs' to hybrid xml for future support.

Tracked-On: #3798
Signed-off-by: Wei Liu <weix.w.liu@intel.com>
Acked-by: Victor Sun <victor.sun@intel.com>

Author: Wei Liu

misc/acrn-config/library/board_cfg_lib.py

@@ -251,13 +251,13 @@ def get_order_type_by_vmid(idx):
     """
     This is get pre launched vm count
     :param idx: index of vm id
-    :return: idx and vm type mapping
+    :return: vm type of index to vmid
     """
-    (err_dic, order_id_dic) = common.get_load_order_by_vmid(SCENARIO_INFO_FILE, VM_COUNT, idx)
+    (err_dic, order_type) = common.get_load_order_by_vmid(SCENARIO_INFO_FILE, VM_COUNT, idx)
     if err_dic:
         ERR_LIST.update(err_dic)
 
-    return order_id_dic
+    return order_type
 
 
 def get_valid_irq(board_info):