Tests: simplify test set up in WP_Block_Supports_Block_Style_Variations_Test

[ramonjd]

What?

A PR to simplify test set up in WP_Block_Supports_Block_Style_Variations_Test

How?

Clean all JSON caches, including WP_Theme_JSON_Resolver_Gutenberg::clean_cached_data(), after test suite runs, not just after any tests

Letting _gutenberg_clean_theme_json_caches() do the work. It runs in tear_down().

Testing Instructions

CI should pass.

npm run test:unit:php should pass locally.

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Co-authored-by: ramonjd <ramonopoly@git.wordpress.org>
Co-authored-by: aaronrobertshaw <aaronrobertshaw@git.wordpress.org>

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[aaronrobertshaw]

LGTM 👍

Thanks for cleaning that up, appreciate it!

[ramonjd]

Thanks for the quick test @aaronrobertshaw

If the tests fail for whatever reason I'll revert this.

Hopefully the ghosts have been chased away.

[aaronrobertshaw]

When I first re-rant the tests locally, I hit the error #62587 addressed.

I had to run npm run wp-env destroy && npm run start before the tests passed locally but they did. So hopefully that bodes well.