scripted-diff: Use new FUZZ_TARGET macro everywhere

-BEGIN VERIFY SCRIPT-

  ren() { sed --regexp-extended -i "s|$1|$2|g" $(git grep -l --extended-regexp "$1"); }

  # Replace FUZZ_TARGET_INIT
  ren 'FUZZ_TARGET_INIT\((.+), (.+)\)' 'FUZZ_TARGET(\1, .init = \2)'

  # Delete unused FUZZ_TARGET_INIT
  sed -i -e '37,39d' src/test/fuzz/fuzz.h

-END VERIFY SCRIPT-

src/test/fuzz/deserialize.cpp

@@ -49,7 +49,7 @@ void initialize_deserialize()
 }
 
 #define FUZZ_TARGET_DESERIALIZE(name, code)                \
-    FUZZ_TARGET_INIT(name, initialize_deserialize)         \
+    FUZZ_TARGET(name, .init = initialize_deserialize)         \
     {                                                      \
         try {                                              \
             code                                           \