[MIG-2028] Update product links feature might not update Jira attachment links properly

The attachment ID was updated but the base URL was left as the source instance. This is the Jira attachment link pattern:

https://jira.source.com/secure/attachment/12345

The base URL https://jira.source.com was not updated to the target Jira Cloud site even though the attachment ID 12345 was correctly updated.

Create a Jira project with an issue and attachment
Add a link to an attachment that contains the format:
```
https://jira.source.com/secure/attachment/12345
```
Migrate the Jira project to Cloud using JCMA

After migrating, the user should be able to update product links: https://support.atlassian.com/migration/docs/update-product-links/
Any attachment link should get updated to the target cloud site and new attachment id value:
```
https://jira.destination.atlassian.net/secure/attachment/11111
```

After the migration and running the task to Update Product Links, the link:

https://jira.source.com/secure/attachment/12345

was updated to:

https://jira.source.com/secure/attachment/11111

Note: the attachment was updated correctly but the base URL did not get updated to the target Jira Cloud URL

Currently, users will need to update the base URL manually for any area that contains these partially updated links:

There are no comments yet on this issue.