[native_assets_cli] Add example for downloading assets #1098

Job	Run time
build (ubuntu, stable, native_assets_builder, false)	5m 1s
build (ubuntu, stable, native_assets_cli, false)	2m 1s
build (ubuntu, stable, native_toolchain_c, false)	1m 59s
build (ubuntu, dev, native_assets_builder, false)	5m 25s
build (ubuntu, dev, native_assets_cli, false)	2m 20s
build (ubuntu, dev, native_toolchain_c, false)	2m 15s
build (macos, stable, native_assets_builder, false)	4m 36s
build (macos, stable, native_assets_cli, false)	59s
build (macos, stable, native_toolchain_c, false)	2m 26s
build (macos, dev, native_assets_builder, false)	4m 19s
build (macos, dev, native_assets_cli, false)	1m 36s
build (macos, dev, native_toolchain_c, false)	1m 42s
build (windows, stable, native_assets_builder, false)	8m 19s
build (windows, stable, native_assets_cli, false)	2m 38s
build (windows, stable, native_toolchain_c, false)	4m 26s
build (windows, dev, native_assets_builder, false)	7m 34s
build (windows, dev, native_assets_cli, false)	3m 30s
build (windows, dev, native_toolchain_c, false)	4m 5s
coverage-finished	2s
	1h 5m 13s

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