Add Workflow Streams library #4968

Job	Run time
test-latest-deps	9m 26s
cloud-test	1m 56s
check-protos	8m 3s
build-lint-test (3.10, windows-latest)	18m 21s
build-lint-test (3.10, macos-intel)	17m 24s
build-lint-test (3.10, macos-arm)	9m 54s
build-lint-test (3.10, ubuntu-latest)	13m 41s
build-lint-test (3.10, ubuntu-arm)	11m 14s
build-lint-test (3.14, windows-latest)	15m 56s
features-tests / test	7m 57s
build-lint-test (3.14, macos-arm)	7m 13s
build-lint-test (3.14, ubuntu-arm)	10m 27s
build-lint-test (3.14, macos-intel)	18m 55s
build-lint-test (3.14, ubuntu-latest)	14m 36s
	2h 45m 3s

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