feat(core): Enable 128-bit trace identifier generation by default (DataDog#6161)

Author: PerfectSlayer

dd-trace-api/src/main/java/datadog/trace/api/ConfigDefaults.java

@@ -192,7 +192,7 @@ public final class ConfigDefaults {
   static final int DEFAULT_TELEMETRY_METRICS_INTERVAL = 10; // in seconds
   static final boolean DEFAULT_TELEMETRY_DEPENDENCY_COLLECTION_ENABLED = true;
 
-  static final boolean DEFAULT_TRACE_128_BIT_TRACEID_GENERATION_ENABLED = false;
+  static final boolean DEFAULT_TRACE_128_BIT_TRACEID_GENERATION_ENABLED = true;
   static final boolean DEFAULT_TRACE_128_BIT_TRACEID_LOGGING_ENABLED = false;
   static final boolean DEFAULT_SECURE_RANDOM = false;