Rust: Add missing file.

Author: geoffw0

rust/ql/test/library-tests/dataflow/sources/web_frameworks/options.yml

@@ -0,0 +1,9 @@
+qltest_cargo_check: true
+qltest_dependencies:
+    - actix-web = { version = "4.10.2" }
+    - axum = { version = "0.8.4" }
+    - poem = { version = "3.1.10" }
+    - serde = { version = "1.0.219" }
+    - serde_json = { version = "1.0.140" }
+    - tokio = { version = "1.43.0", features = ["full"] }
+    - warp = { version = "0.4.2", features = ["server"] }