tf_fuzz: refactor includes to only include what is needed

* Refactor Makefile to automatically gather prerequisites.

* Change the includes (using include-what-you-need) so that files only
  include the specific headers they need. Many includes are also now
  inside the .hpp files instead of the .cpp files.

  This improves editor support: previously, external symbols in .hpp
  files would not be resolved by clangd due to .hpp files not having any
  imports.

Change-Id: Iece03f81c35aa43ac026aaeb49b87d2c4acf07cd
Signed-off-by: Nik Dewally <Nik.Dewally@arm.com>
diff --git a/tf_fuzz/tfz-cpp/utility/data_blocks.cpp b/tf_fuzz/tfz-cpp/utility/data_blocks.cpp
index c84d4d2..21b7f50 100644
--- a/tf_fuzz/tfz-cpp/utility/data_blocks.cpp
+++ b/tf_fuzz/tfz-cpp/utility/data_blocks.cpp
@@ -9,24 +9,16 @@
    associated methods (most importantly their constructors) used in template_
    line, psa_call, psa_asset (etc.). */
 
+#include <stdlib.h>
 #include <string>
 #include <vector>
-#include <cstdint>
+#include <iostream>
 
-#include "class_forwards.hpp"
-
-#include "boilerplate.hpp"
 #include "randomization.hpp"
 #include "gibberish.hpp"
-#include "compute.hpp"
-#include "string_ops.hpp"
 #include "data_blocks.hpp"
-#include "psa_asset.hpp"
-#include "crypto_asset.hpp"
 #include "find_or_create_asset.hpp"
 #include "psa_call.hpp"
-#include "template_line.hpp"
-#include "tf_fuzz.hpp"