Add output flag to send output to file #920

Job	Run time
test (ubuntu-latest)	2m 51s
test (macos-latest)	2m 16s
test (windows-latest)	5m 21s
assert_full_test_suite	10s
Build aarch64-apple-darwin target	2m 59s
Build x86_64-apple-darwin target	3m 38s
Build x86_64-pc-windows-msvc target	6m 31s
Build x86_64-unknown-linux-gnu target	3m 48s
Build x86_64-unknown-linux-musl target	6m 5s
lint	2m 32s
rust-test	3m 8s
rust-test-vectors	4m 4s
kotlin-build-test-deploy-snapshot	1m 57s
kotlin-acceptance-test (ubuntu-latest)	18s
kotlin-acceptance-test (macos-latest)	24s
kotlin-acceptance-test (macos-12)	29s
kotlin-acceptance-test (windows-latest)	27s
	46m 58s

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