Merge pull request #64127 from WanLinghao/use_go_library

Automatic merge from submit-queue (batch tested with PRs 64127, 63895, 64066, 64215, 64202). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

convert Duration into seconds by go library function

**What this PR does / why we need it**:
Here we try convert time.Duration  into int64 seconds. I think it's better to use golang library function,
https://golang.org/pkg/time/#Duration.Round

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

pkg/kubectl/cmd/logs.go

@@ -20,7 +20,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"math"
 	"os"
 	"time"
 
@@ -184,7 +183,7 @@ func (o *LogsOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []str
 	}
 	if sinceSeconds := cmdutil.GetFlagDuration(cmd, "since"); sinceSeconds != 0 {
 		// round up to the nearest second
-		sec := int64(math.Ceil(float64(sinceSeconds) / float64(time.Second)))
+		sec := int64(sinceSeconds.Round(time.Second).Seconds())
 		logOptions.SinceSeconds = &sec
 	}
 	o.GetPodTimeout, err = cmdutil.GetPodRunningTimeoutFlag(cmd)