Update package list delete to return you to the same page

What does this MR do?

Currently, if you delete a package from the package list on a deeper paginated page (i.e. not page 1), you will always be returned to the first page after the delete.

This MR fixes this so that you are returned to the previous page you were on after performing the delete. This also includes some logic to determine if you deleted the last item on a paginated page. If this is the case, it will return you to the previous page.

This was noticed as part of the work for: #197923 (closed).

Screenshots

Before	After

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• [-] Style guides
• [-] Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers
• [-] Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• [-] Label as security and @ mention @gitlab-com/gl-security/appsec
• [-] The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• [-] Security reports checked/validated by a reviewer from the AppSec team