test: fix flaky access-control bulk delete tests failing due to timing issues (#15692)

### What?

Fixed access-control e2e tests that check bulk delete button visibility
based on trash permissions.

<img width="1739" height="764" alt="Screenshot 2026-02-19 at 12 48
33 PM"
src="https://github.com/user-attachments/assets/a70a2e0b-a2fe-4fc0-b47f-f2097eca0021"
/>

### Why?

Tests were selecting rows via checkbox then immediately expecting the
bulk delete button to appear. In slower environments (especially CI),
the bulk selection UI hadn't rendered yet, causing assertions to fail.

### How?

- Target the actual checkbox input instead of the wrapper element
- Use `.check()` instead of `.click()` for reliable checkbox interaction
- Wait for checkbox to be checked and bulk selection UI to show "1
selected"