adbc-driver-manager: add build-adbc-driver-manager.yml for riscv64 wheels

[luhenry]

• Package: adbc-driver-manager
• Version: 1.12.0
• Source: https://github.com/apache/arrow-adbc (python/adbc_driver_manager)
• Docs: https://arrow.apache.org/adbc/

Compiles a Cython/C++ extension wrapping the ADBC C driver-manager API; the C++ sources it reaches for live at the monorepo root and are ordinary tracked files, so no vendoring step is needed. Upstream publishes no riscv64 wheel.

Mirrors upstream's own packaging.yml Linux wheel job (they drive cibuildwheel through docker-compose; this drives it directly).

Differs from upstream

• Checks out go/adbc/v<version> instead of the release tag - the monorepo's release tags are a sequential counter with no version in them, but the Go module tag always points at the same commit and does embed the plain version.

Testing

• Same as upstream's test_packages(): import smoke test, then pytest -k "not sqlite and not duckdb" (this wheel ships no actual driver, so its own sqlite-marked tests can't run).

License: OK.

Built on cp312 (manylinux_2_39_aarch64 rehearsal); 20 passed, 6 skipped, 98 deselected.