builder: Export more env variables for scripts #99

Job	Run time
populate-targets	3s
newt dump (bleprph-nrf52840pdk, ubuntu-latest)	15s
newt dump (bleprph-nrf52840pdk, windows-latest)	1m 45s
newt dump (bleprph-nrf52840pdk, macos-latest)	35s
newt dump (boot-nrf52dk, ubuntu-latest)	18s
newt dump (boot-nrf52dk, windows-latest)	1m 37s
newt dump (boot-nrf52dk, macos-latest)	32s
newt dump (btshell-nrf52840pdk, ubuntu-latest)	15s
newt dump (btshell-nrf52840pdk, windows-latest)	1m 31s
newt dump (btshell-nrf52840pdk, macos-latest)	26s
newt dump (btshell-nrf52dk, ubuntu-latest)	20s
newt dump (btshell-nrf52dk, windows-latest)	1m 40s
newt dump (btshell-nrf52dk, macos-latest)	43s
newt dump (my_blinky_sim, ubuntu-latest)	15s
newt dump (my_blinky_sim, windows-latest)	1m 47s
newt dump (my_blinky_sim, macos-latest)	41s
	12m 43s

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