Add Workflow Streams library #4977

Job	Run time
test-latest-deps	9m 36s
check-protos	7m 56s
features-tests / test	8m 1s
cloud-test	1m 45s
build-lint-test (3.10, macos-arm)	7m 6s
build-lint-test (3.14, windows-latest)	13m 13s
build-lint-test (3.10, ubuntu-arm)	11m 24s
build-lint-test (3.10, windows-latest)	18m 42s
build-lint-test (3.10, ubuntu-latest)	14m 5s
build-lint-test (3.14, macos-arm)	10m 14s
build-lint-test (3.14, ubuntu-arm)	10m 34s
build-lint-test (3.10, macos-intel)	16m 13s
build-lint-test (3.14, ubuntu-latest)	17m 0s
build-lint-test (3.14, macos-intel)	20m 40s
	2h 46m 29s

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