Backend Plugins: Support handling of streaming resource response (#22580)

Use v0.19.0 of SDK.
Support handling of streaming resource response.
Disable gzip/compression middleware for resources 
to allow chunked/streaming response to clients the gzip
middleware had to be disabled since it buffers the full
response before sending it to the client.

Closes #22569

Co-Authored-By: Arve Knudsen <arve.knudsen@gmail.com>

pkg/api/plugins.go

@@ -226,8 +226,8 @@ func (hs *HTTPServer) CheckHealth(c *models.ReqContext) Response {
 	}
 
 	payload := map[string]interface{}{
-		"status": resp.Status.String(),
-		"info":   resp.Info,
+		"status":  resp.Status.String(),
+		"message": resp.Message,
 	}
 
 	if resp.Status != backendplugin.HealthStatusOk {