CI: Refactor ping, image-used fix, update thresholds
- Refactor ping: shorten function, don't use useless variables, PingNoS1 not supported (we don't use it), don't calculate median separately (rely on ping stats only)
- Remove try-except block in ping
- Update thresholds: should make CI pass for SABOX/LTEBOX tests (if no other errors)
- Correctly retrieve image info
Edited by Robert Schmidt