Packages: Move karma-fixtures to new structure

[spacedmonkey]

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• This is a non-user-facing change and requires no QA

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• This PR addresses an existing issue and I have linked this PR to it in ZenHub
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Fixes #

[spacedmonkey]

Just noticed there is a ticket for this...

[github-actions]

Size Change: 0 B

Total Size: 1.43 MB

ℹ️ View Unchanged

Filename	Size	Change
assets/css/edit-story.css	876 B	0 B
assets/css/stories-dashboard.css	288 B	0 B
assets/css/web-stories-embed-block.css	615 B	0 B
assets/js/chunk-fonts-********************.js	44.5 kB	0 B
assets/js/chunk-web-stories-template-0-********************.js	11 kB	0 B
assets/js/chunk-web-stories-template-1-********************.js	11.3 kB	0 B
assets/js/chunk-web-stories-template-2-********************.js	10.9 kB	0 B
assets/js/chunk-web-stories-template-3-********************.js	10.6 kB	0 B
assets/js/chunk-web-stories-template-4-********************.js	12.7 kB	0 B
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assets/js/chunk-web-stories-template-6-********************.js	10.2 kB	0 B
assets/js/chunk-web-stories-template-7-********************.js	10.1 kB	0 B
assets/js/chunk-web-stories-textset-0-********************.js	5.23 kB	0 B
assets/js/chunk-web-stories-textset-1-********************.js	6.79 kB	0 B
assets/js/chunk-web-stories-textset-2-********************.js	7.81 kB	0 B
assets/js/chunk-web-stories-textset-3-********************.js	15.3 kB	0 B
assets/js/chunk-web-stories-textset-4-********************.js	4.38 kB	0 B
assets/js/chunk-web-stories-textset-5-********************.js	5.64 kB	0 B
assets/js/chunk-web-stories-textset-6-********************.js	5.43 kB	0 B
assets/js/chunk-web-stories-textset-7-********************.js	10.3 kB	0 B
assets/js/edit-story.js	652 kB	0 B
assets/js/stories-dashboard.js	492 kB	0 B
assets/js/vendors~chunk-ffmpeg-********************.js	5.61 kB	0 B
assets/js/web-stories-activation-notice.js	74.8 kB	0 B
assets/js/web-stories-embed-block.js	17.7 kB	0 B

_{compressed-size-action}

[swissspidy]

Note that there's no ticket for this refactor because it doesn't necessarily make sense to put this into 1 package as-is. I'd imagined this to be split up into multiple packages or refactored to live closer to the tests configuration.

Let's hold off on this for now so we can get back to the drawing board.

[swissspidy]

Closing in favor of #6281, which has some background on why this needs some more tinkering