lf_interop_qos.py: Added robot functionality (#208)

- Added the perform_robo, generate_report_for_robo and generate_individual_coordinate functions
- Can trigger the robot test with and without rotations at a specific coordinate
Verified CLI: ./lf_interop_qos.py  --ap_name Cisco --mgr 192.168.207.78 --test_duration 1m --upstream_port eth1 --upload 1000000 --mgr_port 8080 --traffic_type lf_udp --tos VI,VO,BE,BK --ssid DLI-LPC992 --passwd Password@123 --security wpa2 --robot_ip 192.168.204.101 --coordinate 3,4 --robot_test

Signed-off-by: Nikhita <kadali.nikhita@candelatech.com>

Author: kadalinikhita