Admin: Fix plugin card overlap with localized install actions on Add Plugins

[itzmekhokan]

Fixes layout on Plugins → Add New where long translated strings for the install/update action (e.g. Japanese, Bengali, German, French) could overlap the plugin title and description. Compact buttons alone did not fully resolve this for all locales and widths (PR #11021, reopened in Trac).

Approach

• Wide viewports (≥1101px): Position .plugin-card .action-links under the plugin icon (top / left / fixed width) so labels stay in the icon column instead of intruding on the text column; remove the large margin-right reserve on .name / .desc > p that fought absolute positioning.
• Tablet / small breakpoints (existing max-width: 1100px + (min-width: 782px) or max-width: 480px query): Give static .action-links full remaining width (calc(100% - 148px)) and reset .desc > p left margin so the description area can use space more sensibly.
  CSS only: src/wp-admin/css/list-tables.css (no PHP/HTML).

Trac ticket: https://core.trac.wordpress.org/ticket/64686

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[sabernhardt]

With these proposed changes, the links overlap content in new places.

Links on top of the thumbnail image at 1200 pixels wide:

Thumbnail images on top of description paragraphs at 1000 pixels:

Buttons with transparent background on top of long plugin names at 560 pixels:

I think the suggestion in the ticket involved either replacing some of the current rules or adding the new rules later in list-tables.css.