Change primary client stats configuration key (#9196)

Author: amarziali

dd-trace-api/src/main/java/datadog/trace/api/config/GeneralConfig.java

@@ -62,6 +62,7 @@ public final class GeneralConfig {
   public static final String HEALTH_METRICS_STATSD_PORT = "trace.health.metrics.statsd.port";
   public static final String PERF_METRICS_ENABLED = "trace.perf.metrics.enabled";
 
+  public static final String TRACE_STATS_COMPUTATION_ENABLED = "trace.stats.computation.enabled";
   public static final String TRACER_METRICS_ENABLED = "trace.tracer.metrics.enabled";
   public static final String TRACER_METRICS_BUFFERING_ENABLED =
       "trace.tracer.metrics.buffering.enabled";

dd-trace-core/src/test/groovy/datadog/trace/common/metrics/MetricsReliabilityTest.groovy

@@ -51,7 +51,7 @@ class MetricsReliabilityTest extends DDCoreSpecification {
     agent.start()
     def props = new Properties()
     props.put("trace.agent.url", agent.getAddress().toString())
-    props.put("trace.tracer.metrics.enabled", "true")
+    props.put("trace.stats.computation.enabled", "true")
     def config = Config.get(props)
     def sharedComm = new SharedCommunicationObjects()
     sharedComm.createRemaining(config)

internal-api/src/main/java/datadog/trace/api/Config.java

@@ -373,6 +373,7 @@
 import static datadog.trace.api.config.GeneralConfig.TRACER_METRICS_MAX_AGGREGATES;
 import static datadog.trace.api.config.GeneralConfig.TRACER_METRICS_MAX_PENDING;
 import static datadog.trace.api.config.GeneralConfig.TRACE_DEBUG;
+import static datadog.trace.api.config.GeneralConfig.TRACE_STATS_COMPUTATION_ENABLED;
 import static datadog.trace.api.config.GeneralConfig.TRACE_TAGS;
 import static datadog.trace.api.config.GeneralConfig.TRACE_TRIAGE;
 import static datadog.trace.api.config.GeneralConfig.TRIAGE_REPORT_DIR;
@@ -1785,7 +1786,9 @@ private Config(final ConfigProvider configProvider, final InstrumenterConfig ins
             && configProvider.getBoolean(PERF_METRICS_ENABLED, DEFAULT_PERF_METRICS_ENABLED);
 
     // Enable tracer computed trace metrics by default for Azure Functions
-    tracerMetricsEnabled = configProvider.getBoolean(TRACER_METRICS_ENABLED, azureFunctions);
+    tracerMetricsEnabled =
+        configProvider.getBoolean(
+            TRACE_STATS_COMPUTATION_ENABLED, azureFunctions, TRACER_METRICS_ENABLED);
     tracerMetricsBufferingEnabled =
         configProvider.getBoolean(TRACER_METRICS_BUFFERING_ENABLED, false);
     tracerMetricsMaxAggregates = configProvider.getInteger(TRACER_METRICS_MAX_AGGREGATES, 2048);