Restore clone_test, accidentally removed by #2700 (#2723)

explorer/fuzzing/BUILD

@@ -116,6 +116,28 @@ cc_test(
     ],
 )
 
+cc_test(
+    name = "clone_test",
+    srcs = ["clone_test.cpp"],
+    args = [
+        "$(locations //explorer:standard_libraries)",
+        "$(locations //explorer/testdata:carbon_files)",
+    ],
+    data = [
+        "//explorer:standard_libraries",
+        "//explorer/testdata:carbon_files",
+    ],
+    deps = [
+        ":ast_to_proto_lib",
+        "//common/fuzzing:carbon_cc_proto",
+        "//explorer/ast",
+        "//explorer/syntax",
+        "@com_google_googletest//:gtest",
+        "@com_google_protobuf//:protobuf_headers",
+        "@llvm-project//llvm:Support",
+    ],
+)
+
 cc_fuzz_test(
     name = "explorer_fuzzer",
     testonly = 1,