feat(Restore Site)!: Restore site config from backup

[cogk]

Restore the site_config.json file in the Restore Site agent job. I don't know why it was not done in Restore Site, but correctly done in New Site from Backup. If anyone knows if it's just an oversight or if it's intentional, I'm eager to know. :)

[cogk]

Should probably drop the following keys from the site config before restoring:

• monitor
• redis_cache
• redis_queue
• redis_socketio
• shallow_clone
• socketio_port
• webserver_port

[codecov]

Codecov Report

Attention: Patch coverage is 87.50000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 42.19%. Comparing base (58bd325) to head (6e43eb0).

Files with missing lines	Patch %	Lines
press/agent.py	87.50%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2213      +/-   ##
==========================================
- Coverage   42.19%   42.19%   -0.01%     
==========================================
  Files         376      376              
  Lines       28695    28698       +3     
==========================================
+ Hits        12109    12110       +1     
- Misses      16586    16588       +2     

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