issue-21446, removing commerce modules from open-source

[jakwinkler]

Fixed Issues (if relevant)

1. Fixes Community themes contain resources for Commerce edition modules #21446

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• README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
• All automated tests passed successfully (all builds are green)

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[Copilot]

Pull Request Overview

This PR removes commerce-specific frontend modules from the open-source Magento distribution by deleting their design (LESS) and layout files.

• Deletes LESS source files for RMA, Reward, MultipleWishlist, GiftWrapping, GiftRegistry, GiftMessage, GiftCardAccount, GiftCard, CustomerBalance, AdvancedCheckout, VersionsCms, CatalogEvent, Banner, and other commerce modules under both luma and blank themes, as well as adminhtml theme files.
• Removes the cart layout move for the GiftCardAccount module.
• Cleans up commerce-only CSS and widget definitions from the open-source codebase.

Reviewed Changes

Copilot reviewed 41 out of 41 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
app/design/frontend/Magento/luma/Magento_Rma/web/css/source/_module.less	Removed RMA module styles
app/design/frontend/Magento/luma/Magento_Reward/web/css/source/_module.less	Removed Reward module styles
app/design/frontend/Magento/luma/Magento_MultipleWishlist/web/css/source/_module.less	Removed MultipleWishlist styles
app/design/frontend/Magento/luma/Magento_GiftWrapping/web/css/source/_module.less	Removed GiftWrapping styles
app/design/frontend/Magento/luma/Magento_GiftRegistry/web/css/source/_module.less	Removed GiftRegistry styles
app/design/frontend/Magento/luma/Magento_GiftMessage/web/css/source/_module.less	Removed GiftMessage styles
app/design/frontend/Magento/luma/Magento_GiftCardAccount/web/css/source/_module.less	Removed GiftCardAccount styles
app/design/frontend/Magento/luma/Magento_GiftCardAccount/layout/checkout_cart_index.xml	Removed GiftCardAccount cart layout customization
...	(Additional commerce module LESS and widget files all deleted)

[ihor-sviziev]

AFAIK both themes are not used in Adobe Commerce, so shouldn't be any issues. Approving.