feat(registry): gitlab support (#3107)

* feat(api): gitlab registry type

* feat(registries): early support for gitlab registries

* feat(app): registry service selector

* feat(registry): gitlab support : list repositories and tags - remove features missing

* feat(registry): gitlab registry remove features

* feat(registry): gitlab switch to registry V2 API for repositories and tags

* feat(api): use development extension binary

* fix(registry): avoid 401 on gitlab retrieve to disconnect the user

* feat(registry): gitlab browse projects without extension

* style(app): code cleaning

* refactor(app): PR review changes + refactor on types

* fix(gitlab): remove gitlab info from registrymanagementconfig and force gitlab type

* style(api): go fmt

* feat(api): update APIVersion and ExtensionDefinitionsURL

* fix(api): fix invalid RM extension URL

* feat(registry): PAT scope help

* feat(registry): defaults on registry creation

* style(registry-creation): update layout and text for Gitlab registry

* feat(registry-creation): update gitlab notice

app/extensions/registry-management/components/registries-repositories-datatable/registryRepositoriesDatatable.html

@@ -30,7 +30,7 @@
             <tr ng-hide="$ctrl.loading" dir-paginate="item in ($ctrl.state.filteredDataSet = ($ctrl.dataset | filter:$ctrl.state.textFilter | orderBy:$ctrl.state.orderBy:$ctrl.state.reverseOrder | itemsPerPage: $ctrl.state.paginatedItemLimit))"
               ng-class="{active: item.Checked}">
               <td>
-                <a ui-sref="portainer.registries.registry.repository({repository: item.Name})" class="monospaced"
+                <a ui-sref="portainer.registries.registry.repository({repository: item.Name})"
                   title="{{ item.Name }}">{{ item.Name }}</a>
               </td>
               <td>{{ item.TagsCount }}</td>