[azeventgrid] Removing the empty Interface any from PublishCloudEventsResponse (Azure#21081)

- Addressing some of the API feedback.
- Removing the `Interface any` from the generated code for an empty response.
- Making our env variable just line up with the common convention for writing out the ephemeral key. Still only available for our tests.

Author: richardpark-msft

sdk/messaging/azeventgrid/autorest.md

@@ -9,8 +9,6 @@ go: true
 input-file: 
     # This was the commit that everyone used to generate their first official betas.
     - https://raw.githubusercontent.com/Azure/azure-rest-api-specs/947c9ce9b20900c6cbc8e95bc083e723d09a9c2c/specification/eventgrid/data-plane/Microsoft.EventGrid/preview/2023-06-01-preview/EventGrid.json
-    # when we start using the .tsp file directly we can start referring to the compiled output.
-    # ./tsp-output\@azure-tools\typespec-autorest\2023-06-01-preview\openapi.json
 license-header: MICROSOFT_MIT_NO_VERSION
 module: github.com/Azure/azure-sdk-for-go/sdk/messaging/azeventgrid
 openapi-type: "data-plane"
@@ -65,4 +63,10 @@ directive:
       - response_types.go
     where: $
     transform: return $.replace(/\*CloudEvent/g, "messaging.CloudEvent");
+
+  # remove the 'Interface any' that's generated for an empty response object.
+  - from:
+      - swagger-document
+    where: $["x-ms-paths"]["/topics/{topicName}:publish?api-version={apiVersion}"].post.responses["200"]
+    transform: delete $["schema"];
 ```

sdk/messaging/azeventgrid/client.go

@@ -25,12 +25,9 @@ func TestFailedAck(t *testing.T) {
 	ce, err := messaging.NewCloudEvent("hello-source", "world", []byte("ack this one"), nil)
 	require.NoError(t, err)
 
-	pubResp, err := c.PublishCloudEvents(context.Background(), c.TestVars.Topic, []messaging.CloudEvent{ce}, nil)
+	_, err = c.PublishCloudEvents(context.Background(), c.TestVars.Topic, []messaging.CloudEvent{ce}, nil)
 	require.NoError(t, err)
 
-	// just documenting this, I don't think the return value is useful.
-	require.Equal(t, map[string]interface{}{}, pubResp.Interface)
-
 	recvResp, err := c.ReceiveCloudEvents(context.Background(), c.TestVars.Topic, c.TestVars.Subscription, &azeventgrid.ReceiveCloudEventsOptions{
 		MaxEvents:   to.Ptr[int32](1),
 		MaxWaitTime: to.Ptr[int32](10),

sdk/messaging/azeventgrid/client_test.go

@@ -69,9 +69,9 @@ func loadEnv() (testVars, error) {
 	// Setting this variable will cause the test clients to dump out the pre-master-key
 	// for your HTTP connection. This allows you decrypt a packet capture from wireshark.
 	//
-	// If you want to do this just set SSLKEYLOGFILE_TEST env var to a path on disk and
+	// If you want to do this just set SSLKEYLOGFILE env var to a path on disk and
 	// Go will write out the key.
-	tv.KeyLogPath = os.Getenv("SSLKEYLOGFILE_TEST")
+	tv.KeyLogPath = os.Getenv("SSLKEYLOGFILE")
 	return tv, nil
 }