Fix USING TIMEOUT time generation (#299)

Scylla does not support fractions.
We need to make sure that time is formatted the following way: XmYsZms

qb/utils.go

@@ -6,6 +6,9 @@ package qb
 
 import (
 	"bytes"
+	"fmt"
+	"strings"
+	"time"
 )
 
 // placeholders returns a string with count ? placeholders joined with commas.
@@ -31,3 +34,26 @@ func (cols columns) writeCql(cql *bytes.Buffer) {
 		}
 	}
 }
+
+func formatDuration(d time.Duration) string {
+	// Round the duration to the nearest millisecond
+	// Extract hours, minutes, seconds, and milliseconds
+	minutes := d / time.Minute
+	d %= time.Minute
+	seconds := d / time.Second
+	d %= time.Second
+	milliseconds := d / time.Millisecond
+
+	// Format the duration string
+	var res []string
+	if minutes > 0 {
+		res = append(res, fmt.Sprintf("%dm", minutes))
+	}
+	if seconds > 0 {
+		res = append(res, fmt.Sprintf("%ds", seconds))
+	}
+	if milliseconds > 0 {
+		res = append(res, fmt.Sprintf("%dms", milliseconds))
+	}
+	return strings.Join(res, "")
+}