[BUG] Replacing a bot keeps older bot files

[davidvitora]

Describe the bug
If you upload a bot '.tgz' file to replace a current bot present in the server (replace), the older bot files that were deleted are not removed.

To Reproduce
Steps to reproduce the behavior:

1. Create a bot and a bot hook for that new bot
2. Export the bot
3. Modify the .tgz file by removing the hook that was also exported.
4. Import the modified bot file with the same id and replace the original.
   
5. Notice how the hook continues in the bot folder.

Expected behavior
Botpress to just keep files present in the .tgz file

Environment (please complete the following information):

• OS: Windows
• Browser Chrome
• Botpress Version 12.26.8
• NodeJS 12.22.7