Python APIの`asyncio`版実装を`mod`内に移す #2535

Job	Run time
actionlint	24s
build-and-test-java-api (windows-latest)	6m 21s
build-and-test-python-api (windows-latest)	6m 22s
build-unix-cpp-example (macos-latest, osx-x64-cpu-cpp-shared)	3m 56s
build-and-test-python-api (macos-latest)	7m 3s
build-unix-cpp-example (ubuntu-latest, linux-x64-cpu-cpp-shared)	1m 44s
build-and-test-java-api (macos-latest)	4m 40s
build-windows-cpp-example	3m 46s
build-and-test-python-api (ubuntu-latest)	2m 46s
build-and-test-java-api (ubuntu-latest)	2m 35s
c-header	47s
rust-integration-test-strategy-matrix	1s
rust-lint	6m 29s
rust-unit-test	8m 39s
shellcheck	12s
validate-cargo-lock	24s
rust-integration-test (windows-2019, directml)	2m 48s
rust-integration-test (macos-11)	2m 22s
rust-integration-test (ubuntu-20.04)	1m 17s
	1h 2m 36s

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