Add storage benchmark #223

Job	Run time
ensure-embedme	13s
ensure-codegen	3m 3s
check-score (hive)	1m 35s
code-quality (hive, stable)	1m 10s
check-score (hive_flutter)	2m 10s
code-quality (hive, beta)	1m 12s
test-hive (vm, kernel)	56s
check-score (hive_generator)	2m 39s
test-hive (chrome, dart2js)	3m 45s
code-quality (hive_flutter, stable)	1m 23s
test-hive_flutter (stable)	55s
test-hive (chrome, dart2wasm)	3m 11s
code-quality (hive_flutter, beta)	1m 21s
test-hive_flutter (beta)	56s
test-hive_generator (stable, ubuntu-latest)	1m 17s
test-hive_generator (stable, windows-latest)	2m 31s
code-quality (hive_generator, stable)	1m 14s
code-quality (hive_generator, beta)	1m 17s
test-hive_generator (beta, ubuntu-latest)	1m 16s
	32m 4s

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