investigate consolidation of reading generation

[edaniszewski]

In the current implementation, the translation from value in the GPB message to a synse reading is very manual and a bit tedious, as it is just a wall of something like

outputs.Boolean.MakeReading(stat.GetLaneLaserReceiverPowerHighWarning()).WithContext(map[string]string{
	"lane_number": laneNumber,
	"metric":      "lane_laser_receiver_power_high_warning",
})

Not sure yet if it is possible to perhaps use reflection and some util methods to generate these in a way that is easier to read/maintain. Will need to spend some time experimenting.