gRPC old/stable semconv support

Author: trask

instrumentation/armeria/armeria-grpc-1.14/javaagent/build.gradle.kts

@@ -76,6 +76,20 @@ tasks {
   }
 }
 
+tasks {
+  val testStableSemconv by registering(Test::class) {
+    testClassesDirs = sourceSets.test.get().output.classesDirs
+    classpath = sourceSets.test.get().runtimeClasspath
+
+    jvmArgs("-Dotel.semconv-stability.opt-in=rpc")
+    systemProperty("metadataConfig", "otel.semconv-stability.opt-in=rpc")
+  }
+
+  check {
+    dependsOn(testStableSemconv)
+  }
+}
+
 if (findProperty("denyUnsafe") as Boolean) {
   tasks.withType<Test>().configureEach {
     enabled = false