Extract component to add/remove admin/mod/manager

We remove some duplication by doing so.

spec/components/admin/roles/table_actions_component_spec.rb

@@ -0,0 +1,17 @@
+require "rails_helper"
+
+describe Admin::Roles::TableActionsComponent, type: :component do
+  let(:user) { create(:user) }
+
+  it "renders link to add the role for new records" do
+    render_inline Admin::Roles::TableActionsComponent.new(user.build_manager)
+
+    expect(page).to have_css "a[data-method='post']", text: "Add"
+  end
+
+  it "renders link to remove the role for existing records" do
+    render_inline Admin::Roles::TableActionsComponent.new(create(:manager, user: user))
+
+    expect(page).to have_css "a[data-method='delete']", text: "Delete"
+  end
+end