同时对服务执行start、daemon-reload、try-restart会残留nop类型job

【标题描述】能够简要描述问题：说明什么场景下，做了什么操作，出现什么问题（尽量使用正向表达方式）
【环境信息】
![输入图片说明](https://images.gitee.com/uploads/images/2022/0209/154535_4f606835_7639856.png "屏幕截图.png")
【问题复现步骤】
执行如下脚本可复现，若脚本卡住，可执行systemctl list-jobs查看已存在nop 状态的服务，这会导致sytemctl动作卡住
必现
```
cat > /etc/systemd/system/test1.service << EOF
[Unit]
Description=whorweTEST1

[Service]
Type=oneshot
ExecStart=/bin/bash /etc/systemd/system/test1.sh

[Install]
WantedBy=test.target
EOF
cat > /etc/systemd/system/test1.sh << EOF
systemctl daemon-reload &
systemctl try-restart test3.service
EOF
chmod +x /etc/systemd/system/test1.sh
cat > /etc/systemd/system/test2.service << EOF
[Unit]
Description=whorweTEST2
After=test1.service

[Service]
ExecStart=/usr/bin/true

[Install]
WantedBy=test.target
EOF
cat > /etc/systemd/system/test3.service << EOF
[Unit]
Description=whorweTEST3
After=test2.service

[Service]
ExecStart=/usr/bin/true

[Install]
WantedBy=test.target
EOF
cat > /etc/systemd/system/test.target << EOF
[Unit]
Description=whorweTEST_TARGET
EOF
systemctl daemon-reload
systemctl enable test1 test2 test3
cp /etc/systemd/system.conf /etc/systemd/system.conf.back
sed -i 's/#DefaultStartLimitBurst=5/DefaultStartLimitBurst=500/g' /etc/systemd/system.conf
systemctl daemon-reload
for i in `seq 1 100`; do
        systemctl stop test1 test2 test3 test.target;
        systemctl restart test.target;
        if [ $(($i%10)) = "0" ]; then
                echo $i;
        fi
done
mv /etc/systemd/system.conf.back /etc/systemd/system.conf
rm -rf /etc/systemd/system/test*
systemctl daemon-reload

```

【预期结果】
nop 状态进程会被清理，不会影响systemctl动作
【实际结果】
卡住
![输入图片说明](https://images.gitee.com/uploads/images/2022/0209/154810_c9102532_7639856.png "屏幕截图.png")
nop 状态的任务一直存在，未被清理
![输入图片说明](https://images.gitee.com/uploads/images/2022/0209/154842_18d4f408_7639856.png "屏幕截图.png")
【附件信息】

src-openEuler/systemd

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