API Fetch: Support preloading in fetchAllMiddleware.

[epiqueras]

Description

It was noted by @TimothyBJacobs that our use of per_page=-1 in preloading was not working as intended because a value of -1 there is a client-side affordance provided by fetchAllMiddleware.

This PR makes API fetch's fetchAllMiddleware requests go through the whole stack of middleware so that the server-inlined preloading middleware has a chance to resolve them.

It also changes our preloading usage of per_page=-1 to per_page=100. This is the initial request size fetchAllMiddleware uses, so it will achieve what we were always intending.

How to test this?

Verify nothing related to loading has changed.

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR.

[github-actions]

Size Change: +5 B (0%)

Total Size: 1.12 MB

Filename	Size	Change
build/api-fetch/index.js	3.4 kB	+5 B (0%)

ℹ️ View Unchanged

Filename	Size	Change
build/a11y/index.js	1.02 kB	0 B
build/annotations/index.js	3.62 kB	0 B
build/autop/index.js	2.83 kB	0 B
build/blob/index.js	620 B	0 B
build/block-directory/index.js	6.93 kB	0 B
build/block-directory/style-rtl.css	790 B	0 B
build/block-directory/style.css	791 B	0 B
build/block-editor/index.js	105 kB	0 B
build/block-editor/style-rtl.css	10.9 kB	0 B
build/block-editor/style.css	10.9 kB	0 B
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build/block-library/editor.css	7.17 kB	0 B
build/block-library/index.js	119 kB	0 B
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build/block-library/style.css	7.48 kB	0 B
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build/block-library/theme.css	686 B	0 B
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build/block-serialization-spec-parser/index.js	3.1 kB	0 B
build/blocks/index.js	48.1 kB	0 B
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build/components/style.css	17.1 kB	0 B
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build/core-data/index.js	11.4 kB	0 B
build/data-controls/index.js	1.29 kB	0 B
build/data/index.js	8.42 kB	0 B
build/date/index.js	5.47 kB	0 B
build/deprecated/index.js	771 B	0 B
build/dom-ready/index.js	568 B	0 B
build/dom/index.js	3.11 kB	0 B
build/edit-navigation/index.js	6.63 kB	0 B
build/edit-navigation/style-rtl.css	857 B	0 B
build/edit-navigation/style.css	856 B	0 B
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build/edit-post/style-rtl.css	12.2 kB	0 B
build/edit-post/style.css	12.2 kB	0 B
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build/edit-site/style.css	5.45 kB	0 B
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build/edit-widgets/style.css	4.59 kB	0 B
build/editor/editor-styles-rtl.css	425 B	0 B
build/editor/editor-styles.css	428 B	0 B
build/editor/index.js	44.6 kB	0 B
build/editor/style-rtl.css	5.06 kB	0 B
build/editor/style.css	5.06 kB	0 B
build/element/index.js	4.65 kB	0 B
build/escape-html/index.js	733 B	0 B
build/format-library/index.js	7.64 kB	0 B
build/format-library/style-rtl.css	502 B	0 B
build/format-library/style.css	502 B	0 B
build/hooks/index.js	2.13 kB	0 B
build/html-entities/index.js	622 B	0 B
build/i18n/index.js	3.56 kB	0 B
build/is-shallow-equal/index.js	711 B	0 B
build/keyboard-shortcuts/index.js	2.51 kB	0 B
build/keycodes/index.js	1.94 kB	0 B
build/list-reusable-blocks/index.js	3.13 kB	0 B
build/list-reusable-blocks/style-rtl.css	226 B	0 B
build/list-reusable-blocks/style.css	226 B	0 B
build/media-utils/index.js	5.29 kB	0 B
build/notices/index.js	1.79 kB	0 B
build/nux/index.js	3.4 kB	0 B
build/nux/style-rtl.css	616 B	0 B
build/nux/style.css	613 B	0 B
build/plugins/index.js	2.56 kB	0 B
build/primitives/index.js	1.5 kB	0 B
build/priority-queue/index.js	789 B	0 B
build/redux-routine/index.js	2.85 kB	0 B
build/rich-text/index.js	14.8 kB	0 B
build/server-side-render/index.js	2.68 kB	0 B
build/shortcode/index.js	1.7 kB	0 B
build/token-list/index.js	1.28 kB	0 B
build/url/index.js	4.02 kB	0 B
build/viewport/index.js	1.84 kB	0 B
build/warning/index.js	1.14 kB	0 B
build/wordcount/index.js	1.17 kB	0 B

_{compressed-size-action}

[youknowriad]

This looks like a reasonable change to me but something that could have some "hidden" impacts per experience :P. Can't think of any at the moment though, so we can ship and see.

[epiqueras]

Can you approve it?