chore: Enable clang-tidy include cleaner (#6947)

src/test/jtx/impl/jtx_json.cpp

@@ -1,8 +1,15 @@
 #include <test/jtx/jtx_json.h>
+
+#include <test/jtx/Env.h>
+#include <test/jtx/JTx.h>
 #include <test/jtx/utility.h>
 
 #include <xrpl/basics/contract.h>
 #include <xrpl/json/json_reader.h>
+#include <xrpl/json/json_value.h>
+
+#include <string>
+#include <utility>
 
 namespace xrpl {
 namespace test {