Direct Transfer - Select parent group downdown is limited to 100 groups

Summary

When using the GitLab UI to select a parent group to import to, only the first 100 groups are presented and the desired group may not be available for selection, including the top-level group itself.

Steps to reproduce

• Create a group containing more than 100 subgroups
• Attempt to perform a Direct Transfer and note the results of the groups returned when selecting the parent group to import to:
• Searching for the desired group may not yield a result when there are more than 100 groups eligible for import to the user.

The list is populated by way of searchNamespacesWhereUserCanImportProjects GraphQL which by default returns only 100 records.

What is the current bug behavior?

Not all import eligible groups are available for selection in the dropdown.

What is the expected correct behavior?

All eligible groups should be available for selection, or perhaps being able to filter for top-level namespaces only/exclude subgroups.