Use test matrix to build examples #236

Job	Run time
test	1m 26s
examples (uno, custom_hal)	34s
lint	15s
examples (uno, morse)	30s
examples (uno, candle)	30s
examples (uno, multiled)	30s
examples (uno, user_func)	35s
examples (uno, hello)	28s
examples (uno, breathe)	31s
examples (uno, simple_on)	35s
examples (uno, fade_on)	30s
examples (uno, sequence)	32s
examples (esp01, custom_hal)	45s
examples (esp01, morse)	46s
examples (esp01, candle)	49s
examples (esp01, multiled)	44s
examples (esp01, user_func)	47s
examples (esp01, hello)	46s
examples (esp01, breathe)	51s
examples (esp01, simple_on)	46s
examples (esp01, fade_on)	47s
examples (esp01, sequence)	47s
examples (nano33ble, custom_hal)	49s
examples (nano33ble, morse)	44s
examples (nano33ble, candle)	50s
examples (nano33ble, multiled)	44s
examples (nano33ble, user_func)	43s
examples (nano33ble, hello)	44s
examples (nano33ble, breathe)	45s
examples (nano33ble, simple_on)	46s
examples (nano33ble, fade_on)	47s
examples (nano33ble, sequence)	44s
examples (esp32dev, custom_hal)	56s
examples (esp32dev, morse)	52s
examples (esp32dev, candle)	56s
examples (esp32dev, multiled)	51s
examples (esp32dev, user_func)	53s
examples (esp32dev, hello)	52s
examples (esp32dev, breathe)	52s
examples (esp32dev, simple_on)	51s
examples (esp32dev, fade_on)	51s
examples (esp32dev, sequence)	50s
examples (nucleo_f401re, multiled_mbed, --project-option="framework=mbed", 3.11, cpp)	2m 39s
	33m 43s

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