deps(metrics-example): update opentelemetry to 0.27

this will help fix the `cargo deny` situation as `opentelemetry-otlp` `0.25` has `tokio` [locked to `~1.38.0`](https://crates.io/crates/opentelemetry-otlp/0.25.0/dependencies) 🤷‍♂️
which then impedes us tfrom updating `netlink-sys`

Pull-Request: #5735.

examples/metrics/Cargo.toml

@@ -12,13 +12,13 @@ release = false
 futures = { workspace = true }
 axum = "0.7"
 libp2p = { path = "../../libp2p", features = ["tokio", "metrics", "ping", "noise", "identify", "tcp", "yamux", "macros"] }
-opentelemetry = { version = "0.25.0", features = ["metrics"] }
-opentelemetry-otlp = { version = "0.25.0", features = ["metrics"] }
-opentelemetry_sdk = { version = "0.25.0", features = ["rt-tokio", "metrics"] }
+opentelemetry = { version = "0.27.0", features = ["metrics"] }
+opentelemetry-otlp = { version = "0.27.0", features = ["metrics"] }
+opentelemetry_sdk = { version = "0.27.0", features = ["rt-tokio", "metrics"] }
 prometheus-client = { workspace = true }
 tokio = { workspace = true, features = ["full"] }
 tracing = { workspace = true }
-tracing-opentelemetry = "0.26.0"
+tracing-opentelemetry = "0.28.0"
 tracing-subscriber = { workspace = true, features = ["env-filter"] }
 
 [lints]

examples/metrics/src/main.rs

@@ -31,7 +31,9 @@ use libp2p::{
     swarm::{NetworkBehaviour, SwarmEvent},
     tcp, yamux,
 };
-use opentelemetry::{trace::TracerProvider, KeyValue};
+use opentelemetry::{trace::TracerProvider as _, KeyValue};
+use opentelemetry_otlp::SpanExporter;
+use opentelemetry_sdk::{runtime, trace::TracerProvider};
 use prometheus_client::registry::Registry;
 use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt, EnvFilter, Layer};
 
@@ -92,14 +94,16 @@ async fn main() -> Result<(), Box<dyn Error>> {
 }
 
 fn setup_tracing() -> Result<(), Box<dyn Error>> {
-    let provider = opentelemetry_otlp::new_pipeline()
-        .tracing()
-        .with_exporter(opentelemetry_otlp::new_exporter().tonic())
-        .with_trace_config(opentelemetry_sdk::trace::Config::default().with_resource(
-            opentelemetry_sdk::Resource::new(vec![KeyValue::new("service.name", "libp2p")]),
-        ))
-        .install_batch(opentelemetry_sdk::runtime::Tokio)?;
-
+    let provider = TracerProvider::builder()
+        .with_batch_exporter(
+            SpanExporter::builder().with_tonic().build()?,
+            runtime::Tokio,
+        )
+        .with_resource(opentelemetry_sdk::Resource::new(vec![KeyValue::new(
+            "service.name",
+            "libp2p",
+        )]))
+        .build();
     tracing_subscriber::registry()
         .with(tracing_subscriber::fmt::layer().with_filter(EnvFilter::from_default_env()))
         .with(