fix(unstable): don't unwrap optional state in otel (#27292)

otel global state may not be initialized if otel is not enabled, so bail
out instead of panicking.

Fixes: #27272

ext/telemetry/lib.rs

@@ -732,9 +732,9 @@ fn op_otel_instrumentation_scope_enter(
 
 #[op2(fast)]
 fn op_otel_instrumentation_scope_enter_builtin(state: &mut OpState) {
-  state.put(InstrumentationScope(
-    BUILT_IN_INSTRUMENTATION_SCOPE.get().unwrap().clone(),
-  ));
+  if let Some(scope) = BUILT_IN_INSTRUMENTATION_SCOPE.get() {
+    state.put(InstrumentationScope(scope.clone()));
+  }
 }
 
 #[op2(fast)]
@@ -749,6 +749,9 @@ fn op_otel_log(
   let Some(Processors { logs, .. }) = OTEL_PROCESSORS.get() else {
     return;
   };
+  let Some(instrumentation_scope) = BUILT_IN_INSTRUMENTATION_SCOPE.get() else {
+    return;
+  };
 
   // Convert the integer log level that ext/console uses to the corresponding
   // OpenTelemetry log severity.
@@ -776,10 +779,7 @@ fn op_otel_log(
     );
   }
 
-  logs.emit(
-    &mut log_record,
-    BUILT_IN_INSTRUMENTATION_SCOPE.get().unwrap(),
-  );
+  logs.emit(&mut log_record, instrumentation_scope);
 }
 
 fn owned_string<'s>(

ext/telemetry/telemetry.ts

@@ -220,6 +220,7 @@ function submitSpan(
   startTime: number,
   endTime: number,
 ) {
+  if (!TRACING_ENABLED) return;
   if (!(traceFlags & TRACE_FLAG_SAMPLED)) return;
 
   // TODO(@lucacasonato): `resource` is ignored for now, should we implement it?