Apply all todoist custom project filters for calendar events

[boralyl]

Breaking change

Proposed change

This PR ensures that we apply all custom project filters when fetching calendar events. Prior to this PR we only filtered custom projects by the include_projects config parameter and not due_date_days or labels. https://www.home-assistant.io/integrations/todoist/#-----configuration-variables--

This caused the state of the custom project calendar to be correct based on the configured filters, but those filters were not all applied when viewing the calendar.

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 Label whitelist gets ignored in custom project #117260
• 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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To help with the load of incoming pull requests:

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

[boralyl]

Filtering by the project_id_whitelist was moved into create_todoist_task where the other 2 filters are applied.

[boralyl]

Unrelated to the PR, but while investigating I wanted to make it clear what the value meant when it was None.