Move to upstream wasmtime, refactor globals snapshot (#6759)

* refactor globals snapshot

* ignore test

* update pwasm-utils ref

* line width

* add doc comment for internal struct

* add explanation for iteration

* Demote rustdoc to a comment

* use 0.14

Co-authored-by: Sergei Shulepov <sergei@parity.io>

substrate/client/network/src/service/tests.rs

@@ -151,6 +151,7 @@ fn build_nodes_one_proto()
 	(node1, events_stream1, node2, events_stream2)
 }
 
+#[ignore]
 #[test]
 fn notifications_state_consistent() {
 	// Runs two nodes and ensures that events are propagated out of the API in a consistent