Add --features runtime-linking to openvino crate

This makes it easier to use the runtime linking feature directly from an `openvino` dependency:
```
openvino = { version = "...", features = ["runtime-linking"] }
```

Author: abrown

crates/openvino/Cargo.toml

@@ -18,3 +18,6 @@ thiserror = "1.0.20"
 
 [dev-dependencies]
 float-cmp = "0.8"
+
+[features]
+runtime-linking = ["openvino-sys/runtime-linking"]