bug report： the file append experiment is unreasonable

[bernersyang]

Issue Description

bug report： the file append experiment is unreasonable.

Describe what happened (or what feature you want)

I wanted to append “HELLO WORLD” to a text file once，but the content was appended every 1 second.
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[root@k8s-master chaosblade-1.7.0]# ./blade create file append --filepath=/root/test.log --content="HELL WORLD"
{"code":200,"success":true,"result":"2a4445e4f9abab62"}

[root@k8s-master chaosblade-1.7.0]# tail -10f /root/test.log 
HELL WORLD
HELL WORLD
HELL WORLD
HELL WORLD
HELL WORLD
HELL WORLD

Describe what you expected to happen

I wanted to append “HELLO WORLD” to a text file once.

[root@k8s-master chaosblade-1.7.0]# cat  /root/test.log 
HELL WORLD

How to reproduce it (as minimally and precisely as possible)

1. touch /root/test.log
2. ./blade create file append --filepath=/root/test.log --content="HELL WORLD"
3. tail -10f /root/test.log

Tell us your environment

Chaosblade version 1.7.0
Linux version 3.10.0-1160.80.1.el7.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-44) (GCC) ) #1 SMP Tue Nov 8 15:48:59 UTC 2022

Anything else we need to know?

Nothing.