Improve UX of status message when group migration is complete
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when import migration is completed, we present this as "an error" to our user:

As mentioned in https://gitlab.com/gitlab-org/gitlab/-/merge_requests/73960#note_727889953 this is definitely confusing in terms of UX
We need to propose a ~UX solution, which will make sure that user have a clear understanding that migration is completed
A typical pattern of "let's display popup" here is not working well:
* Migration is long-term process. There is very high probability that user might leave tab or just "go away" and when he/she will come back - the popup will be gone
* Actually after import is completed we're unable to do import to the same group again (we do not support re-import to the same group), so there is **actually** failed validation message here
## Solution
<details><summary>Original proposal to change the message wording</summary>
These messages should be updated to make clear the User is required to pick a unique destination path.
For example:
> Import is finished. Enter a new name for re-import.
could be
> Import is finished. Enter a new target URL for re-import.
It would be good to review [all the message constants related to group importing](https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/assets/javascripts/import_entities/import_groups/constants.js) as there are a number where "name" is used instead of "URL" or "target URL".
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This solution aims to make the message not needed by disabling the input. Adds a new 'Go to group' primary CTA. Option to re-import (and others) in a ellipsis button.

- [Figma prototype](https://www.figma.com/proto/IQH1rLFLIj8bomC6ayZ347/GitLab-Migration?page-id=1909%3A32108&node-id=2006%3A37676&viewport=351%2C-92%2C0.1&scaling=contain&starting-point-node-id=2006%3A37646&show-proto-sidebar=1)
The default state of table row after an import completes should be the 'Complete/Go to group' state. If user initiates the re-import flow but navigates away/reloads page revert back to 'Completed/Go to group' state.
Move ℹ️ tooltip out of the button lockup. I've moved this to the destination URL input, but there might be unseen implications of doing this. Tooltip content: `Re-import creates a new group. It does not sync with the existing group.` (unchanged)
More context about the solution and its intentions in this [design thread](https://gitlab.com/gitlab-org/gitlab/-/issues/347510#note_1054230505).
The relevant locale/i18n files will also need updating.
/cc @hdelalic @wortschi
issue