MacOS: fail to run unit test

```
= note: ld: library 'fdb_c' not found
          clang: error: linker command failed with exit code 1 (use -v to see invocation)
          

error: could not compile `opendal` (lib test) due to previous error
```


I can run `cargo build` but fail to run unit test, do I need to add FoundationDB  C lib manually?
