Boost dashboard: indicate all external links as such (#43152)

* Boost dashboard: indicate all external links as such

Fixes HOG-74

When pointing to a resource outside of wp-admin, we usually try to follow core's standards and use `ExternalLink` in Jetpack plugins. I would recommend doing the same in Boost.

* Boost connection screen: mark links as external

* Introduce more external link markers in popup

See Automattic/jetpack#43152 (review)

* changelog

* Update tests to match new component structure

* Fix tests

* changelog

* Boost getting started: indicate external link for activate license

* Update cornerstone pages support link to use external link component

* Remove unused link

* Update css error set to use external link component

* Update css error description to use external link component

* Update module boundary to use external link

* Update page cache related notices to use external link

* Remove duplicate word

* Update purchase successful plan link to use external link

* Update interpolate component to use external link

* Update minify legacy notice to use external link

* Remove unnecessary attribute

* Remove unnecessary attributes from css module

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Co-authored-by: Peter Petrov <peter.petrov89@gmail.com>

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/14658509881

Upstream-Ref: Automattic/jetpack@8acf064

Author: jeherve

build/dashboard/jp-search-dashboard.asset.php

@@ -1 +1 @@
-<?php return array('dependencies' => array('jetpack-connection', 'jetpack-script-data', 'lodash', 'react', 'react-jsx-runtime', 'wp-api-fetch', 'wp-components', 'wp-compose', 'wp-data', 'wp-date', 'wp-dom-ready', 'wp-element', 'wp-hooks', 'wp-i18n', 'wp-plugins', 'wp-polyfill', 'wp-primitives', 'wp-url'), 'version' => '398ad58e09675f6d852d');
+<?php return array('dependencies' => array('jetpack-connection', 'jetpack-script-data', 'lodash', 'react', 'react-jsx-runtime', 'wp-api-fetch', 'wp-components', 'wp-compose', 'wp-data', 'wp-date', 'wp-dom-ready', 'wp-element', 'wp-hooks', 'wp-i18n', 'wp-plugins', 'wp-polyfill', 'wp-primitives', 'wp-url'), 'version' => 'e16be7d38d8584cdb455');