Remove timeout for backup services

[ludeeus]

Breaking change

Proposed change

Backup handling can take a long time, this PR removes the timeout for the backup services.
This is also how it's handled when the user triggers the same action in the supervisor UI.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes Snapshot giving timeout error #56735
• This PR is related to issue:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
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• Tests have been added to verify that the new code works.

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  Updated by running python3 -m script.gen_requirements_all.
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[probot-home-assistant]

Hey there @home-assistant/supervisor, mind taking a look at this pull request as it has been labeled with an integration (hassio) you are listed as a code owner for? Thanks!
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