[Grade C] No confirmation dialog before destructive "replace" upload

### StatGPT Admin Frontend version

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### What steps will reproduce the bug?

1. While working with Grade C dataset, click on Upload button
2. Select a file
3. Check 'Also delete records not in this file'
4. Click on Upload -> _there is no any confirmation_ -> **bug**

**Description of the problem:**
When an administrator checks the "Also delete records not in this file" checkbox and clicks Upload, the deletion is triggered immediately with no second confirmation step. The modal does show a warning description, but a single click on "Upload" is the only gate before all absent records are permanently removed from the channel.
**Impact:**
An administrator who accidentally checks the box or misreads the description can permanently delete production data for an entire channel with no recovery path and no undo.

### What is the expected behavior?

[update] Add confirmation pop-up. For example, like it's done for a row deleting -> not nice as there will be one more pop-up

Discussed with the designer. Waiting for an example.

### What do you see instead?

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### Additional information

_No response_