Migrate most of wasmtime from lazy_static to once_cell (#4368)

* Update tracing-core to a version which doesn't depend on lazy-static.

* Update crossbeam-utils to a version that doesn't depend on lazy-static.

* Update crossbeam-epoch to a version that doesn't depend on lazy-static.

* Update clap to a version that doesn't depend on lazy-static.

* Convert Wasmtime's own use of lazy_static to once_cell.

* Make `GDB_REGISTRATION`'s comment a doc comment.

* Fix compilation on Windows.

tests/all/wast.rs

@@ -1,3 +1,4 @@
+use once_cell::sync::Lazy;
 use std::path::Path;
 use std::sync::{Condvar, Mutex};
 use wasmtime::{
@@ -118,9 +119,7 @@ fn feature_found(path: &Path, name: &str) -> bool {
 fn lock_pooling() -> impl Drop {
     const MAX_CONCURRENT_POOLING: u32 = 8;
 
-    lazy_static::lazy_static! {
-        static ref ACTIVE: MyState = MyState::default();
-    }
+    static ACTIVE: Lazy<MyState> = Lazy::new(MyState::default);
 
     #[derive(Default)]
     struct MyState {