feat(storage): allow the s3 list api to accept an optional bucket #2131

Job	Run time
test / test-dart-vm (3.3.0)	1m 30s
test / test-dart-vm (stable)	1m 39s
native_test / test-dart-native (macos-14)	3m 17s
native_test / test-dart-native (windows-latest)	5m 10s
dart2js_test / test-dart-2js (3.3.0, chrome)	6m 4s
dart2js_test / test-dart-2js (3.3.0, firefox)	6m 3s
dart2js_test / test-dart-2js (stable, chrome)	5m 34s
ddc_test / test-dart-ddc (3.3.0, chrome)	3m 48s
dart2js_test / test-dart-2js (stable, firefox)	5m 55s
ddc_test / test-dart-ddc (3.3.0, firefox)	4m 21s
ddc_test / test-dart-ddc (stable, chrome)	4m 5s
ddc_test / test-dart-ddc (stable, firefox)	4m 10s
	51m 36s

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