title: Why is Turbo not honoring link_to method: :post?
body: <p>For a long time, Rails has provided a <code>method: :post</code> option in the <code>link_to</code> helper: when the option was given, Rails would intercept the click and issue a POST request, instead of the default GET request.</p>
  <p>However, for some unknown reason, this is not working in Rails 7: despite adding <code>method: :post</code> to my <code>link_to</code> helper, Rails sends a GET request (not a POST request). I thought Turbo was supposed to take care of it, but it does not seem to be happening.</p>
  <p>This is what you can do to reproduce, very simple steps:</p>
  <pre><code>$ rails new example_app
  $ bin/rails g scaffold Book title
  $ bin/rails db:create &amp;&amp; bin/rails db:migrate
  $ echo &quot;&lt;%= link_to &quot;New book&quot;, new_book_path, method: :post %&gt;&quot; &gt;&gt; app/views/books/index.html.erb
  $ bin/rails s
  </code></pre>
  <p>Now visit <code>localhost:3000/books</code> from your web browser, and click on the <em>second</em> &quot;New book&quot; link. I would expect getting an error (after all, I did not configure the proper POST route) but, unfortunately, Rails isues a GET request - and not a POST request, as it should have:</p>
  <pre><code>Started GET &quot;/books/new&quot; for ::1 at 2021-12-27 17:40:43 +0100
  Processing by BooksController#new as HTML
    Rendering layout layouts/application.html.erb
    Rendering books/new.html.erb within layouts/application
    Rendered books/_form.html.erb (Duration: 9.1ms | Allocations: 5216)
    Rendered books/new.html.erb within layouts/application (Duration: 10.2ms | Allocations: 5594)
    Rendered layout layouts/application.html.erb (Duration: 12.9ms | Allocations: 7759)
  Completed 200 OK in 25ms (Views: 13.6ms | ActiveRecord: 4.3ms | Allocations: 12404)
  </code></pre>
  <p>Why is this happening? Shouldn't Turbo intercept the link, and, as Rails UJS did in the past, send a POST request?</p>