chore(telemetry): update baggage telemetry name (#9379)

Author: rachelyangdog

dd-trace-core/src/test/groovy/datadog/trace/core/baggage/BaggagePropagatorTelemetryTest.groovy

@@ -78,14 +78,14 @@ class BaggagePropagatorTelemetryTest extends Specification {
     malformedMetric.tags.contains("header_style:baggage")
 
     def bytesTruncatedMetric = metrics.find {
-      it.metricName == "context_header_style.truncated" &&
+      it.metricName == "context_header.truncated" &&
         it.tags.contains("truncation_reason:baggage_byte_count_exceeded")
     }
     bytesTruncatedMetric != null
     bytesTruncatedMetric.value == 1
 
     def itemsTruncatedMetric = metrics.find {
-      it.metricName == "context_header_style.truncated" &&
+      it.metricName == "context_header.truncated" &&
         it.tags.contains("truncation_reason:baggage_item_count_exceeded")
     }
     itemsTruncatedMetric != null

internal-api/src/main/java/datadog/trace/api/metrics/BaggageMetrics.java

@@ -33,12 +33,12 @@ private BaggageMetrics() {
             "context_header_style.malformed", this.malformedCounter, "header_style:baggage"));
     counters.add(
         new TaggedCounter(
-            "context_header_style.truncated",
+            "context_header.truncated",
             this.truncatedByteCounter,
             "truncation_reason:baggage_byte_count_exceeded"));
     counters.add(
         new TaggedCounter(
-            "context_header_style.truncated",
+            "context_header.truncated",
             this.truncatedItemCounter,
             "truncation_reason:baggage_item_count_exceeded"));
     this.taggedCounters = Collections.unmodifiableList(counters);

internal-api/src/test/groovy/datadog/trace/api/telemetry/CoreMetricCollectorBaggageTest.groovy

@@ -72,7 +72,7 @@ class CoreMetricCollectorBaggageTest extends Specification {
 
     then:
     def baggageMetric = metrics.find {
-      it.metricName == "context_header_style.truncated" &&
+      it.metricName == "context_header.truncated" &&
         it.tags.contains("truncation_reason:baggage_byte_count_exceeded")
     }
     baggageMetric != null
@@ -91,7 +91,7 @@ class CoreMetricCollectorBaggageTest extends Specification {
 
     then:
     def baggageMetric = metrics.find {
-      it.metricName == "context_header_style.truncated" &&
+      it.metricName == "context_header.truncated" &&
         it.tags.contains("truncation_reason:baggage_item_count_exceeded")
     }
     baggageMetric != null