Tests: Merge Uncode Theme Tests

[n7studios]

Summary

Uncode theme tests were failing due to its reliance on an older version of the Options Tree plugin, which incorrectly assumes get_template() always returns a value. This caused our individual End-to-End tests to break when switching themes or deactivating plugins.

To work around this, the two tests were merged into one, ensuring the theme and plugin state remain consistent during the test. This resolves the failures without modifying Uncode itself.

Testing

Existing tests pass.

Checklist

• I have written a test and included it in this PR
• I have run all tests and they pass
• The code passes when running the PHP CodeSniffer
• Code meets WordPress Coding Standards for PHP, HTML, CSS and JS
• Security and Sanitization requirements have been followed
• I have assigned a reviewer or two to review this PR (if you're not sure who to assign, we can do this step for you)

[github-actions]

WordPress Playground

🚀 Your PR has been built and is ready for testing in WordPress Playground!

Click here to test your changes in WordPress Playground

[noelherrick]

If I understand this correctly, these two tests when ran in parallel would sometimes cause failures since one would remove the theme and then the other one would expect it. If so, I'm curious why merging them would solve it because other tests set the theme.

[n7studios]

If I understand this correctly, these two tests when ran in parallel would sometimes cause failures since one would remove the theme and then the other one would expect it. If so, I'm curious why merging them would solve it because other tests set the theme.

Honestly, I'm not sure, given the (two) existing tests correctly switch to/from the Uncode theme. I think the Uncode theme isn't the most reliable, and it's not something I particularly want to focus time and resources on, given its limited usage.