Previously, the `setCardButtonStatus()` JS function was called when a card had the ID 'plugin-information-footer'. However, the card will only exist on plugin install pages. This caused a failure when updating plugins from the plugin row on `plugins.php` due to an undefined `$card` variable.
This adds a guard to ensure that the current page is one of the plugin install pages, preventing the error and allowing plugin updates from the `plugins.php` rows to work as expected.
Follow-up to [57545].
Props Presskopp, huzaifaalmesbah, krupajnanda, hellofromTonya, krupalpanchal, costdev.
Fixes#60521.
Built from https://develop.svn.wordpress.org/trunk@57615
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