Implement all storage after prefix (#4227)

* Implement all storage after prefix

* fix test, bump version and fix doc

* bump metadata version

* Update frame/support/procedural/src/storage/storage_struct.rs

substrate/bin/node/runtime/src/lib.rs

@@ -78,7 +78,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	// and set impl_version to equal spec_version. If only runtime
 	// implementation changes and behavior does not, then leave spec_version as
 	// is and increment impl_version.
-	spec_version: 195,
+	spec_version: 196,
 	impl_version: 196,
 	apis: RUNTIME_API_VERSIONS,
 };