Move non runtime related stuff into node/primitives (#2743)

* Remove stuff out of the runtime that does not belong there.

There might be more, but it is a start.

* White space fixes.

* Fix tests.

* Leave whitespace in ui tests alone.

* Add back zstd for no reason.

* Fix browser wasm (hopefully)

polkadot/node/overseer/examples/minimal-example.rs

@@ -26,7 +26,7 @@ use futures::{
 };
 use futures_timer::Delay;
 
-use polkadot_primitives::v1::{BlockData, PoV};
+use polkadot_node_primitives::{PoV, BlockData};
 use polkadot_overseer::{Overseer, AllSubsystems};
 
 use polkadot_subsystem::{Subsystem, SubsystemContext, SpawnedSubsystem, FromOverseer};