Fix: Mini Cart block is not available from the Edit template screen

[dinhtungdu]

Fixes #6342

This PR reverts the change in #5653 to register the Mini Cart and Mini Cart Contents blocks for all screens. This allows the Mini Cart block to be available in the Template Editor which is loaded inside the Block Editor.

I decided to register both Mini Cart and Mini Cart Contents blocks for all screens to make the code simpler. The Mini Cart Contents block isn't visible in the inserter so the change in this PR won't affect the end-user experience.

Accessibility

• I've tested using only a keyboard (no mouse)
• I've tested using a screen reader
• All animations respect prefers-reduced-motion
• All text has at least a 4.5 color contrast with its background

Other Checks

• This PR adds/removes a feature flag & I've updated this doc .
• This PR adds/removes an experimental interfaces and I've updated this doc
• I tagged two reviewers because this PR makes queries to the database or I think it might have some security impact.

Screenshots

Before	After

Testing

Automated Tests

• Changes in this PR are covered by Automated Tests.
  • Unit tests
  • E2E tests

User Facing Testing

1. With Twenty Twenty-Two, add the Mini Cart block to the header template part.
2. Edit a page using Block Editor.
3. From the Page sidebar, edit the template.

4. Notice the Mini Cart block works as expected.

• Do not include in the Testing Notes

Changelog

Fix: Mini Cart block is not available from the Edit template screen.

[github-actions]

Size Change: 0 B

Total Size: 872 kB

ℹ️ View Unchanged

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[github-actions]

Script Dependencies Report

The compare-assets action has detected some changed script dependencies between this branch and trunk. Please review and confirm the following are correct before merging.

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This comment was automatically generated by the ./github/compare-assets action.

[github-actions]

Script Dependencies Report

The compare-assets action has detected some changed script dependencies between this branch and trunk. Please review and confirm the following are correct before merging.

Script Handle	Added	Removed
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stock-filter-frontend.js	lodash, react, wc-blocks-data-store, wc-settings, wp-a11y, wp-data, wp-element, wp-html-entities, wp-i18n, wp-is-shallow-equal, wp-polyfill, wp-url		⚠️
active-filters-frontend.js	lodash, react, wc-blocks-data-store, wc-price-format, wc-settings, wp-data, wp-element, wp-html-entities, wp-i18n, wp-is-shallow-equal, wp-polyfill, wp-primitives, wp-url		⚠️
cart-frontend.js	lodash, react, wc-blocks-checkout, wc-blocks-data-store, wc-blocks-registry, wc-blocks-shared-hocs, wc-price-format, wc-settings, wp-a11y, wp-api-fetch, wp-autop, wp-compose, wp-data, wp-deprecated, wp-dom, wp-element, wp-hooks, wp-html-entities, wp-i18n, wp-is-shallow-equal, wp-keycodes, wp-plugins, wp-polyfill, wp-primitives, wp-url, wp-warning, wp-wordcount		⚠️
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mini-cart-frontend.js	wc-settings, wp-polyfill		⚠️
single-product-frontend.js	lodash, react, wc-blocks-checkout, wc-blocks-data-store, wc-blocks-registry, wc-blocks-shared-context, wc-blocks-shared-hocs, wc-price-format, wc-settings, wp-a11y, wp-api-fetch, wp-autop, wp-block-editor, wp-blocks, wp-compose, wp-data, wp-deprecated, wp-dom, wp-element, wp-hooks, wp-html-entities, wp-i18n, wp-is-shallow-equal, wp-polyfill, wp-primitives, wp-url, wp-warning, wp-wordcount		⚠️
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This comment was automatically generated by the ./github/compare-assets action.

[dinhtungdu]

Failed E2E test is unrelated. Merged with failed workflow.