Loss of autoexec.bat after every update in BK7238

[DamianLisu]

Describe the bug
After performing an update, the autoexec.bat file is lost every time. The update is performed from the OTA tab with the local file indicated

Firmware:

• Version: 1.18.297
• Device: LSC Smart Connect Plug
• Chip/model: BK7238
• Device config: any, it doesn't matter

To Reproduce
Steps to reproduce the behavior:

1. Go to Filesystem
2. Create autoexec.bat
3. Make any changes to this file, for example
   startDriver NTP
   ntp_setServer 192.168.3.2
4. Go to OTA tab
5. Select local file with firmware
6. Start OTA
7. The process ends correctly
8. The expected restart occurs
9. After restart, there is no autoexec.bat file

[divadiow]

Something like this needs merging

#2115