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

src/test/basics/join_test.cpp

@@ -1,7 +1,15 @@
 #include <test/jtx/Account.h>
 
+#include <xrpl/basics/base_uint.h>
 #include <xrpl/basics/join.h>
-#include <xrpl/beast/unit_test.h>
+#include <xrpl/beast/unit_test/suite.h>
+
+#include <array>
+#include <cstddef>
+#include <initializer_list>
+#include <sstream>
+#include <string>
+#include <vector>
 
 namespace xrpl {
 namespace test {