Refactor tests to use group token instead of sandbox

Prior to this change, the package tests that
use the group endpoint have a sandbox runner
assigned to process the jobs at the group level.
This caused the removal of the runner to be flaky
since there can be too many runners on the general
sanbox.

This change scopes the runner to the group level
avoiding to have all the sandbox runners visible at
the project level

qa/qa/resource/group.rb

@@ -47,6 +47,12 @@ def fabricate_via_api!
         resource_web_url(api_get)
       rescue ResourceNotFoundError
         super
+
+        Support::Retrier.retry_on_exception(sleep_interval: 5) do
+          resource = resource_web_url(api_get)
+          populate(:runners_token)
+          resource
+        end
       end
       def api_get_path

qa/qa/specs/features/browser_ui/5_package/maven_repository_spec.rb

@@ -44,7 +44,7 @@ module QA
           runner.name = "qa-runner-#{Time.now.to_i}"
           runner.tags = ["runner-for-#{project.group.name}"]
           runner.executor = :docker
-          runner.token = project.group.sandbox.runners_token
+          runner.token = project.group.runners_token
         end
       end

qa/qa/specs/features/browser_ui/5_package/npm_registry_spec.rb

@@ -37,7 +37,7 @@ module QA
           runner.name = "qa-runner-#{Time.now.to_i}"
           runner.tags = ["runner-for-#{project.group.name}"]
           runner.executor = :docker
-          runner.token = project.group.sandbox.runners_token
+          runner.token = project.group.runners_token
         end
       end

qa/qa/specs/features/browser_ui/5_package/nuget_repository_spec.rb

@@ -31,9 +31,9 @@ module QA
       let!(:runner) do
         Resource::Runner.fabricate! do |runner|
           runner.name = "qa-runner-#{Time.now.to_i}"
-          runner.tags = ["runner-for-#{project.group.sandbox.name}"]
+          runner.tags = ["runner-for-#{project.group.name}"]
           runner.executor = :docker
-          runner.token = project.group.sandbox.runners_token
+          runner.token = project.group.runners_token
         end
       end
@@ -69,7 +69,7 @@ module QA
                         only:
                           - "#{project.default_branch}"
                         tags:
-                          - "runner-for-#{project.group.sandbox.name}"
+                          - "runner-for-#{project.group.name}"
                     YAML
                 }
             ]
@@ -128,7 +128,7 @@ module QA
                           only:
                             - "#{another_project.default_branch}"
                           tags:
-                            - "runner-for-#{project.group.sandbox.name}"
+                            - "runner-for-#{project.group.name}"
                     YAML
                 }
             ]
@@ -145,7 +145,7 @@ module QA
           expect(job).to be_successful(timeout: 800)
         end
-        project.group.sandbox.visit!
+        project.group.visit!
         Page::Group::Menu.perform(&:go_to_group_packages)