This change adds the capability of filtering and pagination for group
runners, group administrators can search and locate their runners.

This change adds a list of runners to the group runners page. This is a
first iteration that does not include filters and/or pagination for
results.

This change simplifies the usage of get_graphql_query_as_string by
removing the required fragment_paths from it.

This change defines a new form for runners in Vue UI which follows the
design guidelines, this form will later replace the HAML form
to update runner details.

This change improves the testing setup for the runner UI by
generating a fixture with the direct graphql results.