Reflect changes to the venue term, when a venue post gets deleted.

[carstingaxion]

Description of the Change

Closes #730

How to test the Change

Changelog Entry

Fixed - The terms of the shadow taxonomy _gatherpress_venue were not deleted, when the corresponding gatherpress_venue posts were deleted

Credits

Props @carstingaxion, @mauteri

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests pass.

[what-the-diff]

PR Summary

• Improved Venue Post Status Checking
  The code has been altered to better verify whether a specific venue-related post is either being published or removed from the system. This will result in more accurate tracking of venue posts, aiding in data organization and availability.

[mauteri]

@carstingaxion added a small change to the logic to keep it one conditional check and updated unit test. Good find on this bug!!

[carstingaxion]

Cool thing, you updated the test as well! Really.