Rename: primitives/sr-io -> primitives/sp-io (#4328)

* primitives/sr-io -> primitives/io

* fix

* rename

* runtime-io -> sp-io

* git mv

* fix ci

* remove package name

* fix

* fix

* try minimizing diff

* try minimizing diff again

* try minimizing diff again

substrate/docs/CODEOWNERS

@@ -20,7 +20,7 @@
 
 # Wasm execution and the wasm side of Substrate Runtime Interface
 /client/executor/ @pepyakin
-/primitives/sr-io/ @pepyakin
+/primitives/io/ @pepyakin
 
 # Sandboxing capability of Substrate Runtime
 /primitives/sr-sandbox/ @pepyakin