partition_table: Extend the get_partition_info command

A manufactory tool needs to retrieve info about partitions.  With a new flag - "--part_list" we can get a list of partitions with the same type/subtype and easily iterate by it.

- name and flag arguments
- added flag "--part_list" to get a list of partitions with the same type/subtype
- save prev behavior of the get_partition_info command (return the only first item)
- added host test

components/partition_table/gen_esp32part.py

@@ -166,8 +166,8 @@ class PartitionTable(list):
 
         for p in self:
             if p.type == ptype and p.subtype == subtype:
-                return p
-        return None
+                yield p
+        return
 
     def find_by_name(self, name):
         for p in self: