Move functions out of media-utils

[swissspidy]

First step for #561, moving all existing functions out of the media-utils package so that in the next step it can house the same things as @wordpress/media-utils.

In this repo, only the editor package would depend on media-utils.

upload-media is something for the block-editor package, just holding the queue, nothing else.

[github-actions]

Size Change: -277 B (-0.01%)

Total Size: 3.02 MB

Filename	Size	Change
build/media-experiments.js	69 kB	-213 B (-0.31%)
build/view-upload-request.js	17.5 kB	-100 B (-0.57%)

ℹ️ View Unchanged

Filename	Size	Change
build/100.js	88.3 kB	0 B
build/699.js	2.35 MB	0 B
build/blurhash.worker.js	3.23 kB	0 B
build/canvas.worker.js	2.79 kB	0 B
build/chunk-ffmpeg.js	5.91 kB	0 B
build/chunk-selfie-segmentation.js	16.3 kB	0 B
build/dominant-color.worker.js	4.45 kB	0 B
build/ffmpeg.js	1.1 kB	-9 B (-0.81%)
build/heif.worker.js	422 kB	0 B
build/media-experiments-blocks-rtl.css	297 B	0 B
build/media-experiments-blocks.css	296 B	0 B
build/media-experiments-rtl.css	885 B	0 B
build/media-experiments.css	885 B	0 B
build/pdf.js	578 B	+60 B (+11.58%)	⚠️
build/subtitles.js	848 B	-12 B (-1.4%)
build/view-upload-request-view-rtl.css	716 B	0 B
build/view-upload-request-view.css	717 B	0 B
build/vips.worker.js	42.7 kB	-3 B (-0.01%)

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