Add flag to backup store to track backup wizard completion

[emontnemery]

Proposed change

Add flag to backup store to track backup wizard completion

Frontend currently checks if a password has been set to track completion of the backup wizard, unfortunately that means it's possible to create a new key, view it, print the pdf, but that key is in the end not used if the user doesn't complete the wizard.

By adding a wizard completion flag, this behavior can be fixed so a newly created password is immediately saved.

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)
• Deprecation (breaking change to happen in the future)
• 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 #
• This PR is related to issue:
• Link to documentation pull request:
• Link to developer documentation pull request:
• Link to frontend pull request: Use automatic_backups_configured flag to signal if backup onboardin… frontend#24367

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• I have followed the perfect PR recommendations
• The code has been formatted using Ruff (ruff format homeassistant tests)
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• For the updated dependencies - a link to the changelog, or at minimum a diff between library versions is added to the PR description.

To help with the load of incoming pull requests:

• I have reviewed two other open pull requests in this repository.

[home-assistant]

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

Code owner commands

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[MartinHjelmare]

Side note: Just a general note that we should never use a parameter as input to logic for a different thing than the parameter purpose. This is classic lazy design that always comes back and hurts us.

[frenck]

Drafting while we are awaiting the frontend.

/CC @bramkragten

[bramkragten]

Frontend is approved

[emontnemery]

hassio tests need to be updated

[MartinHjelmare]

test_config_load_config_info is failing.