Maintainer access not correctly displayed when search project members

Examples of Maintainers where their access is not rendered properly:

Maintainers only showing developer

• https://gitlab.com/gitlab-org/gitlab-ce/-/project_members?utf8=%E2%9C%93&search=ashmckenzie

• https://gitlab.com/gitlab-org/gitlab-ce/-/project_members?utf8=%E2%9C%93&search=tkua

Maintainers with both developer and maintainer results

⚠ https://gitlab.com/gitlab-org/gitlab-ce/issues/48606 is tracking this work.

• https://gitlab.com/gitlab-org/gitlab-ce/-/project_members?utf8=%E2%9C%93&search=eread

• https://gitlab.com/gitlab-org/gitlab-ce/-/project_members?utf8=%E2%9C%93&search=mikelewis

cc @eread