[smg] import official wfaas crate to replace self managed one (#17724)

sgl-model-gateway/Cargo.toml

@@ -85,6 +85,7 @@ openai-protocol = { version = "1.0.0", features = ["axum"] }
 tool-parser = "1.0.0"
 llm-tokenizer = "1.0.0"
 smg-auth = "1.0.0"
+wfaas = "1.0.0"
 rustls = { version = "0.23", default-features = false, features = ["ring", "std"] }
 rustls-pemfile = "2.2"
 openssl = "0.10.73"
@@ -153,10 +154,6 @@ tonic-v12 = { version = "0.12.3", package = "tonic" }
 serial_test = "3.0"
 rsa = { version = "0.9", features = ["sha2"] }
 
-[[bench]]
-name = "special_token_search"
-harness = false
-path = "benches/special_token_search.rs"
 [[bench]]
 name = "wasm_middleware_latency"
 harness = false