feat(presets): add gstreamer-rust monorepo (#30739)

lib/data/monorepo.json

@@ -302,6 +302,7 @@
     "groovy": "https://github.com/apache/groovy",
     "grpc-dotnet": "https://github.com/grpc/grpc-dotnet",
     "grpc-java": "https://github.com/grpc/grpc-java",
+    "gstreamer-rust": "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs",
     "guava": "https://github.com/google/guava",
     "Hangfire": "https://github.com/HangfireIO/Hangfire",
     "hickory-dns": "https://github.com/hickory-dns/hickory-dns",