[NuGet.org Bug]: [Admin UI] Allow admins to select a specific number of package versions in the Admin Unlist UI

[advay26]

Impact

It's more difficult to complete my work

Describe the bug

When we have to unlist many package versions at once, we often need to break it up into smaller batches. We could add the ability to select the first 'X' <unlisted/listed> package versions to help with this.

We could also show how many package versions have been selected (possibly in the button text). Right now, we show it as an alert that pops up once we've clicked the button, but showing it earlier would be more useful.

Repro Steps

1. Go to the Bulk Unlist UI in the Admin Panel
2. Enter names of packages you need to unlist
3. Scroll down

Expected Behavior

1. Add the ability to select the first 'X' <unlisted/listed> package versions among those shown.

2. Show how many package versions have been selected (possibly in the button text)

Screenshots

No response

Additional Context and logs

No response