Add scala instrumentation (#2677)

This helps with context propagation issues when using akka or play
instrumentation.

Author: trask

agent/agent-tooling/src/main/java/com/microsoft/applicationinsights/agent/internal/init/AiConfigCustomizer.java

@@ -267,10 +267,12 @@ private static void enableInstrumentations(Configuration config, Map<String, Str
     if (config.preview.instrumentation.akka.enabled) {
       properties.put("otel.instrumentation.akka-actor.enabled", "true");
       properties.put("otel.instrumentation.akka-http.enabled", "true");
+      properties.put("otel.instrumentation.scala-fork-join.enabled", "true");
     }
     if (config.preview.instrumentation.play.enabled) {
       properties.put("otel.instrumentation.play-mvc.enabled", "true");
       properties.put("otel.instrumentation.play-ws.enabled", "true");
+      properties.put("otel.instrumentation.scala-fork-join.enabled", "true");
     }
     if (config.preview.instrumentation.apacheCamel.enabled) {
       properties.put("otel.instrumentation.apache-camel.enabled", "true");