[harness-automation] add a parser tool for TopologyConfig file (#4975)
[harness-automation] add a parser tool for TopologyConfig file (#4975)

- parse TopologyConfig file in Thread Certification Test Harness
- list multi-vendor device numbers by case
- list needed vendor device numbers for the whole certification testbed
chshu/openthread,jwhui/openthread,jwhui/openthread,openthread/openthread,chshu/openthread,lanyuwen/openthread,srickardti/openthread,chshu/openthread,srickardti/openthread,bukepo/openthread,librasungirl/openthread,bukepo/openthread,librasungirl/openthread,chshu/openthread,abtink/openthread,abtink/openthread,lanyuwen/openthread,lanyuwen/openthread,librasungirl/openthread,lanyuwen/openthread,openthread/openthread,srickardti/openthread,lanyuwen/openthread,openthread/openthread,chshu/openthread,librasungirl/openthread,openthread/openthread,bukepo/openthread,lanyuwen/openthread,jwhui/openthread,bukepo/openthread,abtink/openthread,jwhui/openthread,abtink/openthread,srickardti/openthread,chshu/openthread