fixup test compilation

Signed-off-by: tison <[email protected]>

Author: tisonkun

examples/tracing-grpc/Cargo.toml

@@ -19,7 +19,7 @@ opentelemetry_sdk = { path = "../../opentelemetry-sdk", features = ["rt-tokio"]
 opentelemetry-stdout = { path = "../../opentelemetry-stdout", features = ["trace"] }
 prost = { workspace = true }
 tokio = { workspace = true, features = ["full"] }
-tonic = { workspace = true }
+tonic = { workspace = true, features = ["server"] }
 
 [build-dependencies]
 tonic-build = { workspace = true }

opentelemetry-otlp/Cargo.toml

@@ -51,6 +51,7 @@ opentelemetry_sdk = { features = ["trace", "rt-tokio", "testing"], path = "../op
 tokio = { workspace = true, features = ["macros", "rt-multi-thread"] }
 futures-util = { workspace = true }
 temp-env = { workspace = true }
+tonic = { workspace = true, features = ["server"] }
 
 [features]
 # telemetry pillars and functions