chore: update download apis to use path #1685

Job	Run time
test / test-dart-vm (3.0.1)	2m 5s
test / test-dart-vm (stable)	2m 4s
native_test / test-dart-native (macos-latest)	4m 59s
ddc_test / test-dart-ddc (3.0.1, chrome)	3m 41s
native_test / test-dart-native (windows-latest)	3m 32s
ddc_test / test-dart-ddc (3.0.1, firefox)	3m 32s
ddc_test / test-dart-ddc (stable, chrome)	3m 31s
ddc_test / test-dart-ddc (stable, firefox)	3m 42s
dart2js_test / test-dart-2js (3.0.1, chrome)	4m 14s
dart2js_test / test-dart-2js (3.0.1, firefox)	4m 18s
dart2js_test / test-dart-2js (stable, chrome)	4m 25s
dart2js_test / test-dart-2js (stable, firefox)	4m 32s
	44m 35s

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