Limit admin print action shouldRender targets to details

[melissaluu]

What

Removes unsupported Admin selection print-action shouldRender targets from the 2026-10-rc docs/types branch.

Keeps the supported detail targets:

• admin.order-details.print-action.should-render
• admin.product-details.print-action.should-render

Removes unsupported selection targets:

• admin.order-index.selection-print-action.should-render
• admin.product-index.selection-print-action.should-render

Why

Core and Admin Web now support print-action should_render only for detail pages. The selection/bulk print-action targets should not be advertised or typed for the next Admin UI Extensions release branch.

Follow-up to the 2025-10 cleanup: #4652
World support PRs: shop/world#2016728 and shop/world#2016776

Testing

• yarn workspace @shopify/ui-extensions docs:admin 2026-10-rc 2026-10-rc
• git diff --check
• yarn lint
• yarn type-check

Forward-port of #4656