`metas`出力時に話者情報をマージする #2474

Job	Run time
shellcheck	20s
validate-cargo-lock	24s
actionlint	21s
build-and-test-java-api (windows-latest)	6m 40s
build-and-test-java-api (macos-latest)	4m 8s
build-unix-cpp-example (macos-latest, osx-x64-cpu-cpp-shared)	4m 7s
build-and-test-python-api (windows-latest)	6m 27s
build-and-test-java-api (ubuntu-latest)	2m 51s
build-unix-cpp-example (ubuntu-latest, linux-x64-cpu-cpp-shared)	1m 52s
build-and-test-python-api (macos-latest)	6m 7s
build-and-test-python-api (ubuntu-latest)	2m 54s
build-windows-cpp-example	4m 19s
c-header	59s
rust-integration-test-strategy-matrix	3s
rust-lint	2m 5s
rust-unit-test	3m 38s
rust-integration-test (windows-2019, directml)	3m 51s
rust-integration-test (macos-11)	2m 34s
rust-integration-test (ubuntu-20.04)	1m 6s
	54m 46s

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