Move ffi stream and utils from arrow to arrow-array (#5670)

* Move ffi stream and utils from arrow to arrow-array

* Fix CI

* Remove TODOs

Author: alexandreyc

arrow-array/Cargo.toml

@@ -50,6 +50,9 @@ num = { version = "0.4.1", default-features = false, features = ["std"] }
 half = { version = "2.1", default-features = false, features = ["num-traits"] }
 hashbrown = { version = "0.14", default-features = false }
 
+[features]
+ffi = ["arrow-schema/ffi", "arrow-data/ffi"]
+
 [dev-dependencies]
 rand = { version = "0.8", default-features = false, features = ["std", "std_rng"] }
 criterion = { version = "0.5", default-features = false }