[I] [Improve][SDK]Increase the conn pool size for Golang SDK [inlong]

[via GitHub]

gunli opened a new issue, #11663:
URL: https://github.com/apache/inlong/issues/11663

   ### Description
   
   Currently, the conn pool size is 512, it may be not enough for those big 
cluster.
   ```go
   func (c *client) initConns() error {
        epList := c.discoverer.GetEndpoints()
        epLen := len(epList)
        if epLen == 0 {
                return ErrNoEndpoint
        }
   
        endpoints := make([]string, epLen)
        for i := 0; i < epLen; i++ {
                endpoints[i] = epList[i].Addr
        }
   
        // minimum connection number per endpoint is 1
        connsPerEndpoint := int(math.Ceil(float64(c.options.WorkerNum) * 1.2 / 
float64(epLen)))
        pool, err := connpool.NewConnPool(endpoints, connsPerEndpoint, 512, c, 
c.log)
        if err != nil {
                return err
        }
   
        c.connPool = pool
        return nil
   }
   ```
   
   ### InLong Component
   
   InLong SDK
   
   ### Are you willing to submit PR?
   
   - [x] Yes, I am willing to submit a PR!
   
   ### Code of Conduct
   
   - [x] I agree to follow this project's [Code of 
Conduct](https://www.apache.org/foundation/policies/conduct)
   


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