CPU/CodeCache: Rewrite using new-rec's block management

src/common/perf_scope.h

@@ -0,0 +1,20 @@
+// SPDX-FileCopyrightText: 2023 Connor McLaughlin <stenzek@gmail.com>, PCSX2 Team
+// SPDX-License-Identifier: GPL-3.0
+
+#pragma once
+
+#include "types.h"
+
+class PerfScope
+{
+public:
+  constexpr PerfScope(const char* prefix) : m_prefix(prefix) {}
+  bool HasPrefix() const { return (m_prefix && m_prefix[0]); }
+
+  void Register(const void* ptr, size_t size, const char* symbol);
+  void RegisterPC(const void* ptr, size_t size, u32 pc);
+  void RegisterKey(const void* ptr, size_t size, const char* prefix, u64 key);
+
+private:
+  const char* m_prefix;
+};