Use Capybara methods to find/click/check links

We applied the Capybara/SpecificMatcher in commit f52a86b46.  However,
this rule doesn't convert methods finding <a> tags to methods finding
links because <a> tags only count as links when they've got the `href`
attribute. For instance, in the `xss_spec.rb` file we check what happens
when clicking on an anchor tag because we're testing that the `href`
attribute has been removed and so we can't use `click_link`.

So, basically, we can't enable a rule to automatically detect when we're
using `have_css` instead of `have_link`, but we should still do it
because `have_link` adds an extra check which affects accessibility
since it makes sure the tag has the `href` attribute and so it's
recognizable as a link by screen readers.

spec/components/admin/action_component_spec.rb

@@ -5,13 +5,13 @@ describe Admin::ActionComponent do
     it "includes an HTML class for the action by default" do
       render_inline Admin::ActionComponent.new(:edit, double, path: "/")
 
-      expect(page).to have_css "a.edit-link.admin-action"
+      expect(page).to have_link class: %w[edit-link admin-action]
     end
 
     it "keeps the admin-action class when the class is overwritten" do
       render_inline Admin::ActionComponent.new(:edit, double, path: "/", class: "modify-link")
 
-      expect(page).to have_css "a.modify-link.admin-action"
+      expect(page).to have_link class: %w[modify-link admin-action]
       expect(page).not_to have_css ".edit-link"
     end
   end
@@ -28,7 +28,7 @@ describe Admin::ActionComponent do
 
       render_inline Admin::ActionComponent.new(:edit, record, path: "/")
 
-      expect(page).to have_css "a.edit-link#edit_computer_1"
+      expect(page).to have_link class: "edit-link", id: "edit_computer_1"
     end
 
     it "can be overwritten" do
@@ -36,7 +36,7 @@ describe Admin::ActionComponent do
 
       render_inline Admin::ActionComponent.new(:edit, record, path: "/", id: "my_id")
 
-      expect(page).to have_css "a.edit-link#my_id"
+      expect(page).to have_link class: "edit-link", id: "my_id"
       expect(page).not_to have_css "#edit_computer_1"
     end
   end