key_manager: Delete move operations

Prevents the singleton from being moved from.

src/core/crypto/key_manager.h

@@ -231,6 +231,9 @@ public:
     KeyManager(const KeyManager&) = delete;
     KeyManager& operator=(const KeyManager&) = delete;
 
+    KeyManager(KeyManager&&) = delete;
+    KeyManager& operator=(KeyManager&&) = delete;
+
     bool HasKey(S128KeyType id, u64 field1 = 0, u64 field2 = 0) const;
     bool HasKey(S256KeyType id, u64 field1 = 0, u64 field2 = 0) const;