refactor: `cstr!("…")`を`c"…"`に置き換える #3012

Job	Run time
actionlint	14s
build-and-test-java-api (windows-latest)	5m 16s
build-and-test-python-api (windows-latest)	5m 36s
build-unix-cpp-example (macos-latest, osx-x64-cpu-cpp-shared)	1m 30s
build-unix-cpp-example (ubuntu-latest, linux-x64-cpu-cpp-shared)	1m 35s
build-and-test-java-api (macos-latest)	2m 46s
build-and-test-python-api (macos-latest)	3m 9s
build-and-test-python-api (ubuntu-latest)	3m 9s
build-and-test-java-api (ubuntu-latest)	2m 48s
build-windows-cpp-example	4m 5s
c-header	45s
rust-lint	3m 15s
rust-integration-test-strategy-matrix	1s
rust-unit-test	5m 53s
shellcheck	11s
validate-cargo-lock	21s
rust-integration-test (macos-12)	2m 53s
rust-integration-test (ubuntu-20.04)	1m 53s
	45m 20s

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