[wasm] Fix includes in wasm-code-manager.h

This removes three unneeded includes from wasm-code-manager.h, and adds
four that were missing.

R=ahaas@chromium.org

Bug: v8:7490, v8:8834
Change-Id: I0f0f367c0ff748cc1561689b7e2badf3a7a01ca5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1513717Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60168}

src/wasm/wasm-code-manager.h

@@ -5,11 +5,12 @@
 #ifndef V8_WASM_WASM_CODE_MANAGER_H_
 #define V8_WASM_WASM_CODE_MANAGER_H_
 
-#include <functional>
+#include <atomic>
 #include <list>
 #include <map>
-#include <unordered_map>
-#include <unordered_set>
+#include <memory>
+#include <utility>
+#include <vector>
 
 #include "src/base/macros.h"
 #include "src/builtins/builtins-definitions.h"