Add Response Status Number in http trace logs. (opensearch-project#16978)

Signed-off-by: Rishikesh1159 <rishireddy1159@gmail.com>

Author: Rishikesh1159

server/src/main/java/org/opensearch/http/HttpTracer.java

@@ -116,10 +116,11 @@ void traceResponse(
     ) {
         logger.trace(
             new ParameterizedMessage(
-                "[{}][{}][{}][{}][{}] sent response to [{}] success [{}]",
+                "[{}][{}][{}][{}][{}][{}] sent response to [{}] success [{}]",
                 requestId,
                 opaqueHeader,
                 restResponse.status(),
+                restResponse.status().getStatus(),
                 restResponse.contentType(),
                 contentLength,
                 httpChannel,

server/src/test/java/org/opensearch/http/AbstractHttpServerTransportTests.java

@@ -285,6 +285,8 @@ public HttpStats stats() {
                             + opaqueId
                             + "\\]\\["
                             + (badRequest ? "BAD_REQUEST" : "OK")
+                            + "\\]\\["
+                            + (badRequest ? "400" : "200")
                             + "\\]\\[null\\]\\[0\\] sent response to \\[.*"
                     )
                 );