Alphabetize build targets in cvd/cli/parser #79

Job	Run time
build-installer-iso-job	2m 44s
test-iso-multidisk-qemu-disk2-with-data-job	2h 5m 7s
test-iso-qemu-job	2h 3m 16s
test-iso-cf-qemu-job	2h 1m 58s
test-iso-multidisk-qemu-empty-disk-job	2h 8m 14s
test-iso-multidisk-qemu-disk5-with-data-job	2h 14m 38s
	10h 35m 57s

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