chore(writer): enable health metrics based on config (#14661)

## Description

Enable health metrics in the native writer based on configuration

## Testing

<!-- Describe your testing strategy or note what tests are included -->

## Risks

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-->

## Additional Notes

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Author: VianneyRuhlmann

ddtrace/internal/native/_native.pyi

@@ -323,6 +323,11 @@ class TraceExporterBuilder:
         :param runtime_id: The runtime id to use for telemetry.
         """
         ...
+    def enable_health_metrics(self) -> TraceExporterBuilder:
+        """
+        Enable health metrics in the TraceExporter
+        """
+        ...
     def build(self) -> TraceExporter:
         """
         Build and return a TraceExporter instance with the configured settings.

ddtrace/internal/writer/writer.py

@@ -828,6 +828,8 @@ def _create_exporter(self) -> native.TraceExporter:
                 config._telemetry_heartbeat_interval * 1000
             )  # Convert DD_TELEMETRY_HEARTBEAT_INTERVAL to milliseconds
             builder.enable_telemetry(heartbeat_ms, get_runtime_id())
+        if config._health_metrics_enabled:
+            builder.enable_health_metrics()
 
         return builder.build()
 

src/native/data_pipeline/mod.rs

@@ -156,6 +156,11 @@ impl TraceExporterBuilderPy {
         Ok(slf.into())
     }
 
+    fn enable_health_metrics(mut slf: PyRefMut<'_, Self>) -> PyResult<Py<Self>> {
+        slf.try_as_mut()?.enable_health_metrics();
+        Ok(slf.into())
+    }
+
     /// Consumes the wrapped builder.
     ///
     /// The builder shouldn't be reused