Incorrect translation of Ping error codes #62592

Spotted in #62559:

On non-Windows the error code in raw-socket Ping code path is translated incorrectly:

• runtime/src/libraries/System.Net.Ping/src/System/Net/NetworkInformation/IcmpV4MessageConstants.cs

  Line 80 in 57bfe47

  return IPStatus.TimeExceeded;

• runtime/src/libraries/System.Net.Ping/src/System/Net/NetworkInformation/IcmpV6MessageConstants.cs

  Lines 79 to 84 in 57bfe47

  	case IcmpV6TimeExceededCode.HopLimitExceeded:
  	return IPStatus.TimeExceeded;
  	case IcmpV6TimeExceededCode.FragmentReassemblyTimeExceeded:
  	return IPStatus.TtlReassemblyTimeExceeded;
  	default:
  	return IPStatus.TimeExceeded;

  
  (should be TtlExpired instead of TimeExceeded)

In the non-privileged code path running the ping command line utility it will presumably return TimeExceeded without an address. The SendPingToExternalHostWithLowTtlTest outer loop test should be modified accordingly to detect this case.