Use wp_cache_get in gutenberg_get_global_styles_svg_filters.

[spacedmonkey]

What?

Part of #45171

wp_get_global_styles_svg_filters: migrate transient to object cache.

Why?

How?

Testing Instructions

Testing Instructions for Keyboard

Screenshots or screencast

[github-actions]

Flaky tests detected in 523925b.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/4015726150
📝 Reported issues:

• [Flaky Test] should always expand single line selection #39787 in specs/editor/various/multi-block-selection.test.js

[Mamaduka]

@spacedmonkey, the improved method isn't used anywhere in the plugin. It might make more sense to apply changes directly in the core. What do you think?

[spacedmonkey]

I agree @Mamaduka . See https://github.com/oandregal/wordpress-develop/pull/1 and comment from @oandregal https://github.com/oandregal/wordpress-develop/pull/1#issuecomment-1397804223

[oandregal]

Right, this method needs to be used in Gutenberg, otherwise, how do we test it? :) Take a look at how wp_get_global_styles_svg_filters for inspiration. I also see that it was removed #46102 so that should be helpful in setting it up.

This also needs testing steps. cc @ajlende for thoughts on what'd be the best to test, as I seem to remember that browsers were a bit funky on this one.

[spacedmonkey]

@oandregal I am going to close this out and move this conversion to core. This is not the best place to test this.

[spacedmonkey]

PR here WordPress/wordpress-develop#3926