Fix script repeat variable lifetime

[pnbruckner]

Proposed change

In a script repeat action, the repeat variable was not defined while evaluating the while or until conditions. This change makes sure it is defined then.

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

Example entry for configuration.yaml:

# Example configuration.yaml
my_script:
  sequence:
    - alias: Repeat the sequence AS LONG AS the conditions are true
      repeat:
        while:
          - condition: state
            entity_id: input_boolean.run_loop
            state: 'on'
          - condition: template
            value_template: "{{ repeat.index <= 20 }}"
        sequence:
          - ...

Additional information

• This PR fixes or closes issue: fixes Script repeat action not defining repeat variable in while or until conditions #38117
• This PR is related to issue:
• Link to documentation pull request:

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
• The code has been formatted using Black (black --fast 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.
• Untested files have been added to .coveragerc.

The integration reached or maintains the following Integration Quality Scale:

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[pnbruckner]

Original intent was to have repeat variable defined just within the sequence, which is how it was implemented. But later examples provided used it in while conditions, so intention changed but implementation didn't follow. This solves that problem! 😅