[Privacy][Codemod][TransferMegarepoThirdPartyLibraryOwnership] Asset Ownership Update For asset://code.third_party_library/fbsource/xplat%2Fcaffe2%2Fthird_party (#78937)

Differential Revision: D36817082

Pull Request resolved: https://github.com/pytorch/pytorch/pull/78937
Approved by: https://github.com/dagitses
diff --git a/third_party/METADATA.bzl b/third_party/METADATA.bzl
new file mode 100644
index 0000000..6a1a9a4
--- /dev/null
+++ b/third_party/METADATA.bzl
@@ -0,0 +1,7 @@
+METADATA = {
+    "maintainers": [
+        "pytorch_dev_infra",
+    ],
+    "name": "third_party",
+    "owner": "pytorch_dev_infra",
+}