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

[luhenry]

• Package: adbc-driver-sqlite
• Version: 1.12.0
• Source: https://github.com/apache/arrow-adbc
• Docs: https://arrow.apache.org/adbc/

Compiles the SQLite-based ADBC driver (c/driver/sqlite, C++ over libsqlite3) into libadbc_driver_sqlite.so, which the Python package loads via ctypes as a py3-none wheel. Upstream publishes no riscv64 wheel.

Mirrors upstream's own packaging.yml python-manylinux job and its ci/scripts/python_wheel_unix_{build,relocate}.sh.

Differs from upstream

• libsqlite3 comes from the manylinux image's sqlite-devel instead of vcpkg - no riscv64 binary cache exists for vcpkg.
• No cibuildwheel - the wheel is interpreter-independent, so the image is driven directly instead.

Testing

• Runs the real pytest suite; SQLite is an embedded database, so no external service is needed, unlike the adbc-driver-postgresql port.

License: OK

Built on cp312.