Release: 8.7.0 (#7355)

* Empty commit for release pull request

* Updated changelog.

* Minor lint fix.

* 8.7.0 Testing instructions

* Updated and tidy docs/internal-developers/testing/releases/README.md

* Add filter-link-button mixin (#7357)

* Set default style to link-button mixin

It was identified that we currently have 3 different behaviors for links used in the application. In issue #1778, it was discussed a set of good practices that we should follow in order to obtain consistency between links.

Currently, the link-button mixin is already used by the 'Clear all' button in the Active Filters block, so the idea was to increment it with a common pattern (font size small, font-weight normal, underlined by default and not underlined when on hover) that can be reused by other components (for example FilterResetButton).

* Change link-button mixin to make it attend the expected default style for links

* Replace text-button with link-button mixin in FilterResetButton component

* Add new mixin for links in filter blocks

* Revert change to link-button mixin to prevent it to affect link buttons on Checkout page

* Add filter-link-button mixin that can be used in filter blocks

* Remove link-button styles that were moved to filter-link-button mixin

By default, link-button mixin styles should have only styles from the text-button mixin and also be underlined.

The styles for link button in filter blocks should reside in filter-link-button mixin.

* Cherry picked Add filter-link-button mixin #7357 and updated testing instructions

* Re-added #7273 to changelog

* Correct block name and description (#7354)

* Correct block name and description

* remove duplicated description for controls blocks

* remove duplicated title and desc

* Revert "remove duplicated description for controls blocks"

This reverts commit ed5417e.

* removed #7338 from testing instructions and changelog

* Updated testing zip package.

* Minor formatting fix on the release instructions

* change any to or below the express payment method on cart (#7369)

* Updated zip.

* Add temporary workaround to fix inserting Cart block in WordPress.com (#7367)

* remove problematic actions as deps

* add inline docs

* add todo comment

* Cherry picked: Fix a problem that causes an infinite loop when inserting Cart block in wordpress.com (7367)

* Updated testing zip.

Co-authored-by: github-actions <[email protected]>
Co-authored-by: Paulo Arromba <[email protected]>
Co-authored-by: Alexandre Lara <[email protected]>
Co-authored-by: Tung Du <[email protected]>
Co-authored-by: Alex Florisca <[email protected]>
Co-authored-by: Seghir Nadir <[email protected]>