More sc-service config reexports (#8887)

* Reexport ExecutionStrategies and ExecutionStrategy

* Reexport more of the network

* Reexport the ExecutionStrategy as it's used within ExecutionStrategies

substrate/client/api/src/execution_extensions.rs

@@ -33,7 +33,8 @@ use sp_runtime::{
 	generic::BlockId,
 	traits,
 };
-use sp_state_machine::{ExecutionStrategy, ExecutionManager, DefaultHandler};
+use sp_state_machine::{ExecutionManager, DefaultHandler};
+pub use sp_state_machine::ExecutionStrategy;
 use sp_externalities::Extensions;
 use parking_lot::RwLock;