Add timeout and headers configuration to ZipkinTracingProvider (#3587)

* Add timeout and headers configuration to ZipkinTracingProvider

- Add timeout field to configure HTTP request timeout to Zipkin collector
- Add headers field to allow custom HTTP headers in Zipkin requests

This enhancement provides more control over Zipkin collector communication,
enabling custom authentication, authorization, and metadata headers.

* Add timeout and headers configuration to ZipkinTracingProvider

- Add timeout field to configure HTTP request timeout to Zipkin collector
- Add headers field to allow custom HTTP headers in Zipkin requests

This enhancement provides more control over Zipkin collector communication,
enabling custom authentication, authorization, and metadata headers.

* Add timeout and headers configuration to ZipkinTracingProvider

- Add timeout field to configure HTTP request timeout to Zipkin collector
- Add headers field to allow custom HTTP headers in Zipkin requests

This enhancement provides more control over Zipkin collector communication,
enabling custom authentication, authorization, and metadata headers.# On branch master

* Add timeout and headers configuration to ZipkinTracingProvider

- Add timeout field to configure HTTP request timeout to Zipkin collector
- Add headers field to allow custom HTTP headers in Zipkin requests

This enhancement provides more control over Zipkin collector communication,
enabling custom authentication, authorization, and metadata headers.

* Add timeout and headers configuration to ZipkinTracingProvider

- Add timeout field to configure HTTP request timeout to Zipkin collector
- Add headers field to allow custom HTTP headers in Zipkin requests

This enhancement provides more control over Zipkin collector communication,
enabling custom authentication, authorization, and metadata headers.

Author: prashanthjos

mesh/v1alpha1/config.pb.go

@@ -821,6 +821,14 @@ message MeshConfig {
       // This controls both downstream request header extraction and upstream request header injection.
       // The default value is USE_B3 to maintain backward compatibility.
       TraceContextOption trace_context_option = 6;
+
+      // Optional. The timeout for the HTTP request to the Zipkin collector.
+      // If not specified, the default timeout from Envoy's configuration will be used (which is 5 seconds currently).
+      google.protobuf.Duration timeout = 7;
+
+      // Optional. Additional HTTP headers to include in the request to the Zipkin collector.
+      // These headers will be added to the HTTP request when sending spans to the collector.
+      repeated HttpHeader headers = 8;
     }
 
     // Defines configuration for a Lightstep tracer.