Enable `librocksdb-sys` to be able to be properly cached in development/CI environment

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Feature Request

Is your feature request related to a problem? Please describe.

In the development environment, switching Git branches/commits locally often triggers repeated compilation of librocksdb-sys. If we could cache librocksdb-sys in the development environment, it would significantly improve the development experience.

1. RocksDB is recompiled despite caching restatedev/restate#463
2. MystenLabs/sui@85fb661
3. CI rebuilds librocksdb-sys with a cached rocksdb rust-rocksdb/rust-rocksdb#574

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https://github.com/rust-rocksdb/rust-rocksdb/blob/86d983987e7cafce90ad8a147b0b325e6007eba6/librocksdb-sys/build.rs#L306
https://doc.rust-lang.org/cargo/guide/cargo-home.html#caching-the-cargo-home-in-ci